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Finding the Third Proportional to 5.38 and 12.66

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Solution

The third proportional to 5.38 and 12.66 is: 29.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.38 : 12.66 = 12.66 : x
  2. Step 2: Convert to fraction form
    5.38/12.66 = 12.66/x
  3. Step 3: Cross multiply
    5.38x = 12.66 × 12.66
  4. Step 4: Simplify right side
    5.38x = 160.18
  5. Step 5: Solve for x
    x = 160.18/5.38
  6. Step 6: Final answer
    x = 29.78

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Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.