Solve for x when 60 : 12=30 : x

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Rod · Answer 1 · 2014-12-11T01:20:10+0000

Two ways to do this.
30 in the second ratio is half of 60 in the first ratio; so x is half of 12=6.
In the first ratio, 12 is a fifth of 60; in the second ratio, x is a fifth of 30=6.
Either way, x=6.

John Marsh · Answer 2 · 2014-12-12T09:29:42+0000

Given 60 : 12=30 : x
60/12=30/x
60x=12*30
2x=12
x=6

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Solve for x when 60 : 12=30 : x

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