Question

alguien me ayuda??.. ...​

Answer 1

Explicación paso a paso:

Deje que el número que falta sea "x".

1 / 2 = 4 / x

1 * x = 2 * 4

x = 8

1 / 2 = 4 / 8

3 / 6 = 1 / x

1 / 2 = 1 / x

x = 2

3 / 6 = 1 / 2

2 / 3 = 10 / x

2 * x = 3 * 10

2x = 30

x = 30 / 2

x = 15

2 / 3 = 10 / 15

3 / 5 = 21 / x

3 * x = 5 * 21

3x = 105

x = 105 / 3

x = 35

3 / 5 = 21 / 35

4 / 10 = 2 / x

2 / 5 = 2 / x

2 * x = 5 * 2

2x = 10

x = 10 / 2

x = 5

4 / 10 = 2 / 5

15 / 20 = x / 4

x * 20 = 15 * 4

20x = 60

x = 60 / 20

x = 3

15 / 20 = 3 / 5

4 / 9 = x / 18

9 * x = 4 * 18

9x = 72

x = 72 / 9

x = 8

4 / 9 = 8 / 18

12 / 16 = x / 4

16 * x = 12 * 4

16x = 48

x = 48 / 16

x = 3

12 / 16 = 3 / 4

49 / 21 = x / 3

7 / 3 = x / 3

x = 7

49 / 21 = 7 / 3

7 / 3 = x / 21

3 * x = 7 * 21

3x = 147

x = 147 / 3

x = 49

7 / 3 = 49 / 21

25 / 35 = x / 7

5 / 7 = x / 7

x = 5

25 / 35 = 5 / 7

2 / 4 = 16 / x

1 / 2 = 16 / x

1 * x = 2 * 16

x = 32

2 / 4 = 16 / 32