What is the fourth proportion of 12, 4 and 18?
Show answer & explanation
Correct answer: B
Explanation
Let the fourth proportional = x
12 : 4 = 18 : x
12x = 4 × 18
x = 72 / 12
x = 6
SSC GD Constable - 5 May 2026 - Shift 1 • Quantitative Aptitude • Q60
What is the fourth proportion of 12, 4 and 18?
Correct answer: B
Explanation
Let the fourth proportional = x
12 : 4 = 18 : x
12x = 4 × 18
x = 72 / 12
x = 6