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Finding the Third Proportional to 20 and 29.25

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Solution

The third proportional to 20 and 29.25 is: 42.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20 : 29.25 = 29.25 : x
  2. Step 2: Convert to fraction form
    20/29.25 = 29.25/x
  3. Step 3: Cross multiply
    20x = 29.25 × 29.25
  4. Step 4: Simplify right side
    20x = 855.56
  5. Step 5: Solve for x
    x = 855.56/20
  6. Step 6: Final answer
    x = 42.78

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.