3grapes= 1 pineapple
19 bananas =1 watermelon
3 pineapples =1 watermelon

how many grapes can you get for 4 bananas?

Step-by-step explanation:

19 bananas =1 watermelon

3 pineapples =1 watermelon

Then

19 bananas = 3 pineapples

1 pineapple = 3 grapes,

then

3 pineapples = 9 grapes

3 pineapples = 9 grapes

19 bananas = 3 pineapples

then

9 grapes = 19 bananas

9 grapes = 19 bananas

x grapes = 4 bananas

Write a proportion:

Cross multiply

here is your mark brainliest