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Finding the Third Proportional to 21,890 and 47,744

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Solution

The third proportional to 21,890 and 47,744 is: 104,133.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,890 : 47,744 = 47,744 : x
  2. Step 2: Convert to fraction form
    21,890/47,744 = 47,744/x
  3. Step 3: Cross multiply
    21,890x = 47,744 × 47,744
  4. Step 4: Simplify right side
    21,890x = 2,279,489,536
  5. Step 5: Solve for x
    x = 2,279,489,536/21,890
  6. Step 6: Final answer
    x = 104,133.83

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.