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Finding the Third Proportional to 20.50 and 37.13

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Solution

The third proportional to 20.50 and 37.13 is: 67.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.50 : 37.13 = 37.13 : x
  2. Step 2: Convert to fraction form
    20.50/37.13 = 37.13/x
  3. Step 3: Cross multiply
    20.50x = 37.13 × 37.13
  4. Step 4: Simplify right side
    20.50x = 1,378.27
  5. Step 5: Solve for x
    x = 1,378.27/20.50
  6. Step 6: Final answer
    x = 67.23

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Why These Related Problems?

These problems maintain the same ratio (1.81) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.