what number should be added to each of the numbers 6,15,20 and 43 to make them proportional?
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What number should be added to each of the numbers 6,15,20 and 43 to make them proportional?
Let no. be ‘x’
∴ 6 + x/15 + x = 20 + x/43 + x
⇒ (6 + x)(43 + x) = (20 + x)(15 + x)
⇒ 258 + 49x + x2 = 300 + 35x + x2
⇒ 14x = 42
x = 3
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