Question
If the third proportion of 14 and 28 is “0.5k”, then
find the value of (k − 10) : (k + 8).Solution
Third proportion of two numbers ‘a’ and ‘b’ is (b²/a).
So, 0.5k = (28²/14) = 56
Or, 'k' = 112
Required value = (112 - 10) : (112 + 8) = 102 : 120 = 17 : 20
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