Notam cu A,B,C cele trei parti:
A,B,C direct proporțional cu 19 ,24, 7 => A/19 =B/24=C/7 =K
A/19=K => A= 19 ×K
B/24=K => B=24 ×K
C/7=K => C= 7×K
A+B+C=11200
19×K+24×K+7×K=11200
50×K=11200
K=11200/50
K=224
A=19×K => A=19×224=4256
B=24 ×K=> B=24×224 =5376
C=7×K => C=7 ×224=1568
