issb mathematics MCQ #141

Find the fourth proportional to 3, 6, and 9.

issb mathematics MCQ #141

  1. Question 1

    Q1. Find the fourth proportional to 3, 6, and 9.

    • A) 12
    • B) 15
    • C) 27
    • D) 18

    Answer: 18

    Explanation: In the proportion 3:6 :: 9:x, cross multiply to get 3x equals 54. Dividing gives x equals 18.