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Finding the Fourth Proportional to 16.16, 24.20 and 13.61

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Solution

The fourth proportional to 16.16, 24.20 and 13.61 is: 20.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.16 : 24.20 = 13.61 : x
  2. Step 2: Convert to fraction form
    16.16/24.20 = 13.61/x
  3. Step 3: Cross multiply
    16.16x = 24.20 × 13.61
  4. Step 4: Simplify right side
    16.16x = 329.36
  5. Step 5: Solve for x
    x = 329.36/16.16
  6. Step 6: Final answer
    x = 20.38

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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.