Yes; the following ratios:
____________________________ 

 ;
_______________________________
do, in fact, form a proportion.
_________________________
Note that the fraction, or proportion, "

", cannot be reduced further into whole numbers.
___________________________________
We are given: 
____________________________ 

 .
_________________________________
The question is: Can "

" be further reduced into whole numbers—specifically, does "

" EQUAL "

" ?
________________________________
→ 16/24 =? 2/3 ?
______________________
→ (16 ÷ 8) / (24 ÷ 8) = (2) / (3) = 2/3 . Yes.
_____________________________________
→ As such, 

 ; and the following ratios:

 ;
form a proportion.
_____________________________
Also, given:

 ;
____________________________________
→ If the "cross-products" are equal, then the ratios form a proportion.
_______________________________
→ Does (2) * (24) =? (16) * (3) ?
____________________________
→ Does 48 =? 48 ? Yes!
____________________________
→ As such, the following ratios;
→ 

 ; do, in fact, form a proportion.
________________________________________________________