What number must be added to each of 6, 10, 14 and 22 so that the resulting numbers are in proportion?
A. 2
B. 3
C. 4
D. 1
A. 2
B. 3
C. 4
D. 1
Best answer
Answer: A. 2
Answer: (A) 2
Let x be added. Then (6 + x)(22 + x) = (10 + x)(14 + x).
132 + 28x = 140 + 24x, so 4x = 8 and x = 2.
Check: 8 : 12 = 16 : 24 (both equal 2 : 3).
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