Swansea dominated and went in 2-0 ahead at half-time after a stunning effort from Gylfi Sigurdsson (pictured) and a goal from Nathan Dyer.
A Scott Dann own goal completed a miserable day for Blackburn who remain second from bottom in the Premier League.
Terry Connor's relegation-haunted side remain rooted to the bottom of the table five points behind second-bottom Blackburn and six adrift of third-bottom Bolton, but they at least ended a run of seven straight defeats in the league.
They also ended a run of 30 league matches without a clean sheet, with the last time that they kept their opponents out coming against Aston Villa in a 0-0 draw in August.
Both sides had chances to win the match, but a draw was probably about the right outcome from an instantly forgettable contest in which Sunderland failed to find the net for a third straight game.
A fine strike by Graham Dorrans was enough for
As the two former Fulham and Blackburn Rovers managers faced off in the Midlands, Dorrans buried a 30-yard piledriver on 22 minutes - admittedly helped by slack defending from the visitors - as the hosts largely controlled the first half.
But QPR had their chances. Bobby Zamora was only kept out by some good goalkeeping from Ben Foster in the opening half, while in the second period the West Londoners had the best of the play, but were unable to find an equaliser.
The result sees the Baggies stay 13th, moving above Stoke City on goal difference but leapfrogged by Swansea City after their 3-0 win over Blackburn put them a goal ahead of Roy Hodgson’s side.
The performance of the weekend came at Carrow Road as
Tevez's Argentina team-mate Sergio Aguero weighed in with a couple of goals of his own while substitute Adam Johnson scored in injury time as Roberto Mancini's side kept up thre pressure on leaders
City were temporarily within two points of United, but Wayne Rooney scored twice as the Red Devils roared to a 4-0 win over Aston Villa at Old Trafford, restoring their five-point lead atop the Premier League.
A seventh-minute penalty from Rooney left a sour taste in the mouth after Villa old-boy Ashley Young theatrically milked Ciaran Clark’s contact, while Danny Welbeck tapped home from close range after Villa let a low Patrice Evra cross fizz across goal.
Villa escaped conceding a clear penalty when Nathan Baker handled, sweetening the Young row, which saw the visitors coaching staff complain to referee Mark Halsey at half-time.
Rooney - who had a mediocre game by his standards - struck a deflected third with Nani adding an injury-time fourth as United saw Villa off with ease in the end.
The result puts Sir Alex Ferguson’s defending champions on 82 points with four matches remaining, their next encounter a derby with second-placed Manchester City at Eastlands.