To determine how long the advertising poster will be after the width is enlarged, we can follow these steps:
1. Identify the initial dimensions of the poster:
- The initial length of the poster is 12 inches.
- The initial width of the poster is 9 inches.
2. Determine the new width of the poster:
- The width is being enlarged to 18 inches.
3. Calculate the scale factor for the enlargement:
- The scale factor is the ratio of the new width to the initial width.
- Scale factor = New width / Initial width
- Scale factor = 18 inches / 9 inches
- Scale factor = 2.0
4. Calculate the new length of the poster:
- To maintain the same proportions, the length must also be scaled by the same factor.
- New length = Initial length Scale factor
- New length = 12 inches 2.0
- New length = 24.0 inches
Therefore, if the width of the poster is enlarged to 18 inches, the length of the poster will be 24 inches.
