Both clubs had admitted a charge of failing to ensure players conducted themselves in an orderly fashion.
The incident occurred in the 80th minute of the match at the Liberty Stadium on December 9.
There was a fracas involving Hull's Tom Huddlestone and Yannick Sagbo and Swansea's Ashley Williams, with Chico Flores then flinging himself to the ground feigning that Sagbo had elbowed him.
The match ended in a 1-1 draw after Danny Graham's opener against his former club was cancelled out by Flores in the 60th minute.
Sagbo and Williams were both booked after the incident following an altercation, while Swansea midfielder Jonjo Shelvey was also shown a yellow card in the aftermath.
The game had been the first Premier League match between the two sides.