Chapter 7 - Section 7.2 - Proportion - Exercises - Page 277: 19

x=3.33

Set the product of the means equal to the product of the extremes and solve for the variable. $7\times3x=5 \times14$ $21x=70$ $21x\div21=70\div21$ $x=3.3\underset\uparrow3333$ Round down since the digit after the 3rd significant digit is less than 5.