If 76 is divided into four parts proportional to 7, 5, 3 and 4, then the smallest part is?
9
10
11
12
none
Given ratio = 7 : 5 : 3 : 4, Sum of ratio terms = 19. Smallest part = 12
If 76 is divided into four parts proportional to 7 : 5 : 3 : 4, then the smallest part is ___