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Finding the Third Proportional to 10,221.19 and 20,908.13

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Solution

The third proportional to 10,221.19 and 20,908.13 is: 42,768.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,221.19 : 20,908.13 = 20,908.13 : x
  2. Step 2: Convert to fraction form
    10,221.19/20,908.13 = 20,908.13/x
  3. Step 3: Cross multiply
    10,221.19x = 20,908.13 × 20,908.13
  4. Step 4: Simplify right side
    10,221.19x = 437,149,691.02
  5. Step 5: Solve for x
    x = 437,149,691.02/10,221.19
  6. Step 6: Final answer
    x = 42,768.97

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.