Is 2:7=4:14 a true proportion

Yes because when you divide 4 by 2 you get 2 and when you divide 14 by 2 you get 7

Yes,

You multiply 2 by 2 which you get 4, and then you multiply 7 by 2 which u get 14 which gives 4:14

Another way is by simplifying (i belive that is how you spell it) you divide 4 and 14 by 2 and you get 2:7