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Finding the Third Proportional to 20.88 and 28.48

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Solution

The third proportional to 20.88 and 28.48 is: 38.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.88 : 28.48 = 28.48 : x
  2. Step 2: Convert to fraction form
    20.88/28.48 = 28.48/x
  3. Step 3: Cross multiply
    20.88x = 28.48 × 28.48
  4. Step 4: Simplify right side
    20.88x = 810.91
  5. Step 5: Solve for x
    x = 810.91/20.88
  6. Step 6: Final answer
    x = 38.83

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.