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Finding the Third Proportional to 10.38 and 13.88

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Solution

The third proportional to 10.38 and 13.88 is: 18.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.38 : 13.88 = 13.88 : x
  2. Step 2: Convert to fraction form
    10.38/13.88 = 13.88/x
  3. Step 3: Cross multiply
    10.38x = 13.88 × 13.88
  4. Step 4: Simplify right side
    10.38x = 192.52
  5. Step 5: Solve for x
    x = 192.52/10.38
  6. Step 6: Final answer
    x = 18.56

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.