Question

a. 4:12::6:18
are the following in proportion?​

Answer 1

Yes they are in proportion.

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Answer 2

$\huge\underline\mathfrak\purple{Answer}$

$4 : 12 : : 6 : 18$

$\frac{4}{12} = \frac{6}{18} \\ \\ \frac{1}{3} = \frac{1}{3}$

$so \: they \: are \: in \: proportion$