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Finding the Third Proportional to 10,143 and 20,691

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Solution

The third proportional to 10,143 and 20,691 is: 42,208.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,143 : 20,691 = 20,691 : x
  2. Step 2: Convert to fraction form
    10,143/20,691 = 20,691/x
  3. Step 3: Cross multiply
    10,143x = 20,691 × 20,691
  4. Step 4: Simplify right side
    10,143x = 428,117,481
  5. Step 5: Solve for x
    x = 428,117,481/10,143
  6. Step 6: Final answer
    x = 42,208.17

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.