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Finding the Third Proportional to 12.87 and 17.16

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Solution

The third proportional to 12.87 and 17.16 is: 22.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.87 : 17.16 = 17.16 : x
  2. Step 2: Convert to fraction form
    12.87/17.16 = 17.16/x
  3. Step 3: Cross multiply
    12.87x = 17.16 × 17.16
  4. Step 4: Simplify right side
    12.87x = 294.30
  5. Step 5: Solve for x
    x = 294.30/12.87
  6. Step 6: Final answer
    x = 22.87

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.