If 3 : 12 :: x : 16, then find the value of x  Choose the most appropriate option:
A) 2	B) 3	C) 4	D) 5	E) 6

Rationale: explanation : treat 3 : 12 as 3 / 12 and x : 16 as x / 16 , treat : : as = so we get 3 / 12 = x / 16 = > 12 x = 48 = > x = 4 option b
Answer: B