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Finding the Fourth Proportional to 22.82, 34.22 and 13.87

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Solution

The fourth proportional to 22.82, 34.22 and 13.87 is: 20.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.82 : 34.22 = 13.87 : x
  2. Step 2: Convert to fraction form
    22.82/34.22 = 13.87/x
  3. Step 3: Cross multiply
    22.82x = 34.22 × 13.87
  4. Step 4: Simplify right side
    22.82x = 474.71
  5. Step 5: Solve for x
    x = 474.71/22.82
  6. Step 6: Final answer
    x = 20.81

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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.