Предмет: Математика, автор: igorb6447

12,7:x=4:1,6
Найдите неизвестный член пропорции

Помогите пожалуйста!

Ответы

Автор ответа: Nelia2019

1

Свойства пропорции: произведение крайних членов равно произведению средних.

х= (1,6*12,7) : 4 = 5,08

Ответ: х = 5,08

Автор ответа: prettypushkova

1

12,7 : х = 4 : 1,6

х · 4 = 12,7 · 1,6 - свойство пропорции

х · 4 = 20,32

х = 20,32 : 4

х = 5,08

Ответ: 5,08.

Проверка:

12,7 : 5,08 = 4 : 1,6

2,5 = 2,5 - верно.

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