Question

find the value of x of x:7:::12:21

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Answer 1

Answer:

Product of means = product of extremes

=21x=12×7

=x=84/21=4

Answer 2

$Here, \: x:7:::12:21 \\ = > \frac{x}{7} = \frac{12}{21} \\ = > x \times 21 = 12 \times 7 \\ = > x = \frac{12 \times 7}{21} \\ = \frac{84}{21} \\ = 4$