5/7 = 15/х = х/28 = 30/х = х/77

Предыдущий
вопрос Следующий
вопрос

To find the value of x in each of these proportions, we can set up proportions for each equation:

5/7 = 15/x

Cross multiply to solve for x:

5x = 105
x = 105 / 5
x = 21

Therefore, x = 21 for the first proportion.

Continuing with the next proportion:

15/x = x/28

Cross multiply to solve for x:

15 * 28 = x^2
x^2 = 420
x = √420
x ≈ 20.49

Therefore, x ≈ 20.49 for the second proportion.

Moving on to the third proportion:

x/28 = 30/x

Cross multiply to solve for x:

x x = 28 30
x^2 = 840
x = √840
x ≈ 28.98

Therefore, x ≈ 28.98 for the third proportion.

Lastly, for the fourth proportion:

30/x = x/77

Cross multiply to solve for x:

30 * 77 = x^2
x^2 = 2310
x = √2310
x ≈ 48.02

Therefore, x ≈ 48.02 for the fourth proportion.