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Finding the Third Proportional to 7.31 and 12.94

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Solution

The third proportional to 7.31 and 12.94 is: 22.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.31 : 12.94 = 12.94 : x
  2. Step 2: Convert to fraction form
    7.31/12.94 = 12.94/x
  3. Step 3: Cross multiply
    7.31x = 12.94 × 12.94
  4. Step 4: Simplify right side
    7.31x = 167.38
  5. Step 5: Solve for x
    x = 167.38/7.31
  6. Step 6: Final answer
    x = 22.89

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Why These Related Problems?

These problems maintain the same ratio (1.77) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.