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Finding the Third Proportional to 12.28 and 16.55

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Solution

The third proportional to 12.28 and 16.55 is: 22.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.28 : 16.55 = 16.55 : x
  2. Step 2: Convert to fraction form
    12.28/16.55 = 16.55/x
  3. Step 3: Cross multiply
    12.28x = 16.55 × 16.55
  4. Step 4: Simplify right side
    12.28x = 273.97
  5. Step 5: Solve for x
    x = 273.97/12.28
  6. Step 6: Final answer
    x = 22.31

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.