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Finding the Fourth Proportional to 16.62, 24.95 and 12.84

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Solution

The fourth proportional to 16.62, 24.95 and 12.84 is: 19.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.62 : 24.95 = 12.84 : x
  2. Step 2: Convert to fraction form
    16.62/24.95 = 12.84/x
  3. Step 3: Cross multiply
    16.62x = 24.95 × 12.84
  4. Step 4: Simplify right side
    16.62x = 320.36
  5. Step 5: Solve for x
    x = 320.36/16.62
  6. Step 6: Final answer
    x = 19.28

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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.