Which number should be subtracted from 17, 30, 22, and 40 so that the obtained numbers may become proportional?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 4.
Explanation:
Let the number to be subtracted be x.
According to the question,
The numbers (17 - x), (30 - x), (22 - x) and (40 - x) are in proportion
⇒ (30 - x)(22 - x) = (17 - x)(40 - x)
⇒ 660 - 52x + x2 = 680 - 57x + x2
⇒ 5x = 20
⇒ x = 4
Hence, the required answer is 4.