Question

1) find the value of x if the given ratio are in direct proportion 12:x and 30:15
2). find the fourth proportional of 3/4, 4/5 and 3
3). find the third proportional of 3.6 kg and 14.4kg


4) find the mean proportion between 0.4m and 6.4m

5) find the mean proportion of 0.13 and 0.4 correct to 2 decimal places




please do all of them ​

Answer 1

Answer:

1) 6 rest I am not sure about the answer