Ratio & Proportion · Question 9 · Medium
What number must be added to each of 6, 10, 14 and 22 so that the resulting numbers are in proportion?
- 1
- 3
- 4
- 2
Answer and explanation
Answer: D. 2
Explanation: We need (6 + x)(22 + x) = (10 + x)(14 + x). Expanding: 132 + 28x = 140 + 24x, so x = 2.
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