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Finding the Third Proportional to 9.97 and 15.31

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Solution

The third proportional to 9.97 and 15.31 is: 23.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.97 : 15.31 = 15.31 : x
  2. Step 2: Convert to fraction form
    9.97/15.31 = 15.31/x
  3. Step 3: Cross multiply
    9.97x = 15.31 × 15.31
  4. Step 4: Simplify right side
    9.97x = 234.28
  5. Step 5: Solve for x
    x = 234.28/9.97
  6. Step 6: Final answer
    x = 23.51

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.