Question

The first,third and fourth terms of a proportion are 18,9,5 respectively. find the second term​

Answer 1

Answer:

10

Step-by-step explanation:

let the second term be =x

18:x::9:5

18/x=9/5

90=9x

x=10

Answer 2

Answer:

a=18

a3= 9

a4=5

a2=

Step-by-step explanation:

a2=a4-a4

d=5-9

=-4

d=-4

a2=18+(-4)

a2=14

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