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Finding the Third Proportional to 10,120 and 20,744

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Solution

The third proportional to 10,120 and 20,744 is: 42,521.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,120 : 20,744 = 20,744 : x
  2. Step 2: Convert to fraction form
    10,120/20,744 = 20,744/x
  3. Step 3: Cross multiply
    10,120x = 20,744 × 20,744
  4. Step 4: Simplify right side
    10,120x = 430,313,536
  5. Step 5: Solve for x
    x = 430,313,536/10,120
  6. Step 6: Final answer
    x = 42,521.10

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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.