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Finding the Third Proportional to 21,919 and 47,338

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Solution

The third proportional to 21,919 and 47,338 is: 102,234.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,919 : 47,338 = 47,338 : x
  2. Step 2: Convert to fraction form
    21,919/47,338 = 47,338/x
  3. Step 3: Cross multiply
    21,919x = 47,338 × 47,338
  4. Step 4: Simplify right side
    21,919x = 2,240,886,244
  5. Step 5: Solve for x
    x = 2,240,886,244/21,919
  6. Step 6: Final answer
    x = 102,234.88

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.