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Finding the Fourth Proportional to 8.57, 12.87 and 5.92

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Solution

The fourth proportional to 8.57, 12.87 and 5.92 is: 8.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.57 : 12.87 = 5.92 : x
  2. Step 2: Convert to fraction form
    8.57/12.87 = 5.92/x
  3. Step 3: Cross multiply
    8.57x = 12.87 × 5.92
  4. Step 4: Simplify right side
    8.57x = 76.16
  5. Step 5: Solve for x
    x = 76.16/8.57
  6. Step 6: Final answer
    x = 8.88

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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.