Final answer:
Yes, a painting that is 24 inches in length and 18 inches in width is proportional. For every increase or decrease of 4 units in length, there will be a corresponding increase or decrease of 3 units in width, maintaining the same ratio.
Step-by-step explanation:
Yes, a painting that is 24 inches in length and 18 inches in width is proportional. Two quantities are proportional when a change in one quantity results in a corresponding change in the other quantity in the same ratio. In this case, if we divide the length of the painting (24 inches) by the width (18 inches), we get a ratio of 4:3. This means that for every increase or decrease of 4 units in length, there will be a corresponding increase or decrease of 3 units in width, maintaining the same ratio.
Learn more about Proportions in mathematics