I'll be flying in on the 'fourth'. [=the fourth day of the month]
He got a base hit in the 'fourth'. [=the fourth inning]
She drank a 'fourth' of the bottle.
(..) northwest quadrant. Penetrated feet. Missed the living quarters. Only minor damage to corridors and . - Is there any radiation? - None detected. Doppler shows a fourth wave approaching. - Prim! - Prim! - Katniss! - Katniss! - Keep moving, keep moving! (..)2014 The Hunger Games: Mockingjay - Part 1