solve one step at a time
24/2 = x/3
cross multiply
24*3 = 2x
72 = 2x
36 = x
Now 36/3 = y/5.5
cross multiply
36 * 5.5 = 3y
198 = 3y
66=y
Now 66/5.5 = 108/z
cross multiply
66z = 5.5 * 108
66z = 594
z = 9
Now 108/9 = w/15
cross multiply
108*15 = 9w
1620 = 9w
180 = w
Now we can plug this all back in
24/2 = x/3 = y/5.5 = 108/z =w/15
x = 36
y = 66
z = 9
w = 180
24/2 = 36/3 = 66/5.5 = 108/9 = 180/15
Hope this helps!