Given:
Sarah is planning two gardens.
The smaller garden has a width of 9 ft and a length of 12 ft.
The length of the larger garden is 4 ft longer than the length of the smaller garden.
So, the length of the larger garden = 12 + 4 = 16
Let the width of the larger garden = x
The length and width of the larger garden are in the same proportion to the length and width of the smaller garden.
so,
![(9)/(12)=(x)/(16)](https://img.qammunity.org/2023/formulas/mathematics/college/rrgoao7243zqt8sshcnoq2rd1udpotgtzu.png)
solve for x:
![\begin{gathered} 12x=9\cdot16 \\ 12x=144 \\ \\ x=(144)/(12)=12 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/j2xdmylds8r1vqtgoybb1nj66pjo2a5won.png)
so, the width of the larger garden = 12 ft