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Finding the Fourth Proportional to 23.11, 31.87 and 14.92

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Solution

The fourth proportional to 23.11, 31.87 and 14.92 is: 20.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.11 : 31.87 = 14.92 : x
  2. Step 2: Convert to fraction form
    23.11/31.87 = 14.92/x
  3. Step 3: Cross multiply
    23.11x = 31.87 × 14.92
  4. Step 4: Simplify right side
    23.11x = 475.50
  5. Step 5: Solve for x
    x = 475.50/23.11
  6. Step 6: Final answer
    x = 20.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.