hello?? divide 28 in a ratio 3:4?

First add up the total number of parts = 3+4 = 7Now divide 28 by 7 = 4 (each part is 4)Now substitute into the ratio=    3*4: 4*4  =  12:16 Hope this helps! :)

[tex]3x+4x=28\\
7x=28\\
x=4\\\\
3x=\boxed{12}\\
4x=\boxed{16}[/tex]