The first, second and fourth numbers in a proportion are 31, 12 and 156, respectively.The third number is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 403.
a : b = c : d
Let the third number = x
12 × x = 31 × 156
x = (31 × 156) ÷ 12 = 4836 ÷ 12 = 403