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Finding the Third Proportional to 21,873 and 40,992

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Solution

The third proportional to 21,873 and 40,992 is: 76,822.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,873 : 40,992 = 40,992 : x
  2. Step 2: Convert to fraction form
    21,873/40,992 = 40,992/x
  3. Step 3: Cross multiply
    21,873x = 40,992 × 40,992
  4. Step 4: Simplify right side
    21,873x = 1,680,344,064
  5. Step 5: Solve for x
    x = 1,680,344,064/21,873
  6. Step 6: Final answer
    x = 76,822.75

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Why These Related Problems?

These problems maintain the same ratio (1.87) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.