Question

Find the unknown following proportions

a) x:3 = 4:5
b) 2:y = 1:3
c) 7:15 = z:2
d) 4:7 = 12:x ​

Answer 1

Answer:

(a) 12/5, (b) 6, (c) 14/15, (d) 21

Step-by-step explanation:

(a) x/3 = 4/5. Then, we cross multiplication this. 3×x=3×4 =5x =12 Ans. 12/5

(b) 2/y =1/3. then, again cross multiplication. 1×y =y =2×3 =6. y =6. Ans. 6

(c) 7/15 =z/2 then, cross multiplication. z×15 =7×2 =15z=14. Ans. 14/15

(d) 4/7=12/x. then, cross multiplication. 4×x =12×7 =4x=84 Ans. 84/4 =21