Question

If a:b=c:d,then a/b=c/d is callled ​

Answer 1

Answer:

ad=bc

Step-by-step explanation:

a,b,c,d are in proportion

a/b = c/d

=> b/a = d/c is invertendo

=>a/c = b/d is alternendo

=> (a+b)/b =(c+d)/d is componendo

=>(a-b)/b = (c-d)/d is dividendo