Which of the following are in proportion?

Explanation:

If the ratio of first two numbers is equal to the ratio of last two then that four numbers are in proportion.

(A) Given numbers are = 16, 4, 32, 8

16/4 = 4

32/8 = 4

Since, 16/4 = 32/8 = 4, then 16:4::32:8, in proportion.

(B) Given numbers are =18, 10, 9, 5

18/10 = 9/5 ⇒ 18:10::9:5

Hence it is in proportion.

(C) Given numbers are = 16, 30, 24, 45

16/30 = 8/15 and 24/45 = 8/15

Then, 16/30 = 24/45 = 8/15 then 16:30::24:45, it is in proportion.

(D) Given numbers are = 3, 4, 2, 6

3/4 ≠ 2/6 = 1/3, then it is not in proportion.

Final Answer:

Hence, (A), (B) and (C) are in proportion.

A: 16, 4, 32, 8

B: 18, 10, 9, 5

C: 16, 30, 24, 45