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Finding the Third Proportional to 21,687 and 47,343

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Solution

The third proportional to 21,687 and 47,343 is: 103,350.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,687 : 47,343 = 47,343 : x
  2. Step 2: Convert to fraction form
    21,687/47,343 = 47,343/x
  3. Step 3: Cross multiply
    21,687x = 47,343 × 47,343
  4. Step 4: Simplify right side
    21,687x = 2,241,359,649
  5. Step 5: Solve for x
    x = 2,241,359,649/21,687
  6. Step 6: Final answer
    x = 103,350.38

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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.