Question

8. What number must be added to the numbers
3, 7 and 13 so that they are in a continued
proportion?​

Answer 1

Step-by-step explanation:

x2+1must be the next ok

Answer 2

5

Step-by-step explanation:

3 + 5 = 8

7 + 5 = 12

13 + 5 = 18

${12}^{2} = 144$

$8 \times 18 = 144$

Now, 8, 12 and 18 are in continued proportion