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Finding the Third Proportional to 19,909.50 and 41,979

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Solution

The third proportional to 19,909.50 and 41,979 is: 88,512.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,909.50 : 41,979 = 41,979 : x
  2. Step 2: Convert to fraction form
    19,909.50/41,979 = 41,979/x
  3. Step 3: Cross multiply
    19,909.50x = 41,979 × 41,979
  4. Step 4: Simplify right side
    19,909.50x = 1,762,236,441
  5. Step 5: Solve for x
    x = 1,762,236,441/19,909.50
  6. Step 6: Final answer
    x = 88,512.34

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.