The number 15 has to _____ the same ratio that 17 has to 51.
Assume that the missing number =x
Then,
15x=1751x=15×5117x=45
Hence, the number 15 has to 45 the same ratio that 17 has to 51.
The number 9 has to 12 the same ratio that 18 has to _____.
63 has to 35 the same ratio that ____ has to 25