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Finding the Fourth Proportional to 16.80, 25.05 and 15.24

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Solution

The fourth proportional to 16.80, 25.05 and 15.24 is: 22.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.80 : 25.05 = 15.24 : x
  2. Step 2: Convert to fraction form
    16.80/25.05 = 15.24/x
  3. Step 3: Cross multiply
    16.80x = 25.05 × 15.24
  4. Step 4: Simplify right side
    16.80x = 381.76
  5. Step 5: Solve for x
    x = 381.76/16.80
  6. Step 6: Final answer
    x = 22.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.