Finding the Fourth Proportional to 49.99, 74.99 and 13.92
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Solution
The fourth proportional to 49.99, 74.99 and 13.92 is: 20.88
Step by Step Solution
- Step 1: Write the proportion equation
49.99 : 74.99 = 13.92 : x - Step 2: Convert to fraction form
49.99/74.99 = 13.92/x - Step 3: Cross multiply
49.99x = 74.99 × 13.92 - Step 4: Simplify right side
49.99x = 1,043.98 - Step 5: Solve for x
x = 1,043.98/49.99 - Step 6: Final answer
x = 20.88
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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.