Question

20 : 130 :: 42 : ?
please answer me​

Answer 1

Answer:

273 is the answer

hope it helps ☺✌

Answer 2

The value of "?" that satisfies the given proportionality equation is 273.

Given :

The double proportion equation 20 : 130 :: 42 : ?

To Find :

The value of "?" that satisfies the proportion

Solution :

A general double proportion is of the form :

                      $a : b :: c : d$

This means that the constant of proportion i.e. "k" of the two ratios is the same. i.e. it follows : $\frac{a}{b} = \frac{c}{d}$

The constant of proportionality of the first ratio i.e. k1

                                    $= a / b$

                                    $= 20/130$

The constant of proportionality of the second ratio i.e. k2

                                    $= c / d$

                                    $= 42 / x$

As the proportionality of the two ratios will be the same ( as formulated above ),

                         $20 / 130 = 42 / x$

                                $x = 42 * 130 / 20$

                                $x = 21 * 13$

                                $x = 273$

Hence, the missing value in the given proportionality equation is 273.

To learn more about Proportionality, visit

https://brainly.in/question/11920947

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