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Finding the Third Proportional to 21,920 and 47,940

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Solution

The third proportional to 21,920 and 47,940 is: 104,846.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,920 : 47,940 = 47,940 : x
  2. Step 2: Convert to fraction form
    21,920/47,940 = 47,940/x
  3. Step 3: Cross multiply
    21,920x = 47,940 × 47,940
  4. Step 4: Simplify right side
    21,920x = 2,298,243,600
  5. Step 5: Solve for x
    x = 2,298,243,600/21,920
  6. Step 6: Final answer
    x = 104,846.88

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.