Hockey : Football = 13 : 30
[1950 ÷ 13 = 150]
Hockey : Football = 13x150 : 30x150 = 1950 : 4500
Answer: 4500
The problem statement tells us parking spaces are in the proportion ...
... (football spaces)/(hockey spaces) = 30/13 = (football spaces)/1950
Multiplying by 1950 give the solution
... football spaces = 1950·30/13 = 4500
Football fans will have 4500 spacs