Finding the Fourth Proportional to 19.29, 28.96 and 13.31
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Solution
The fourth proportional to 19.29, 28.96 and 13.31 is: 19.99
Step by Step Solution
- Step 1: Write the proportion equation
19.29 : 28.96 = 13.31 : x - Step 2: Convert to fraction form
19.29/28.96 = 13.31/x - Step 3: Cross multiply
19.29x = 28.96 × 13.31 - Step 4: Simplify right side
19.29x = 385.55 - Step 5: Solve for x
x = 385.55/19.29 - Step 6: Final answer
x = 19.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.