Finding the Fourth Proportional to 17.20, 25.79 and 14.55
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Solution
The fourth proportional to 17.20, 25.79 and 14.55 is: 21.82
Step by Step Solution
- Step 1: Write the proportion equation
17.20 : 25.79 = 14.55 : x - Step 2: Convert to fraction form
17.20/25.79 = 14.55/x - Step 3: Cross multiply
17.20x = 25.79 × 14.55 - Step 4: Simplify right side
17.20x = 375.24 - Step 5: Solve for x
x = 375.24/17.20 - Step 6: Final answer
x = 21.82
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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.