find the number which when added to each term of the ratio 27:35, changes the ratio to 4:5.
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let the number be x
(27+x):(35+x)=4:5
product of extremes=product of means
5(27+x)=4(35+x)
135+5x=140+4x
5x-4x=140-135
x=5
(27+x):(35+x)=4:5
product of extremes=product of means
5(27+x)=4(35+x)
135+5x=140+4x
5x-4x=140-135
x=5
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