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Finding the Third Proportional to 9,997.88 and 21,879

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Solution

The third proportional to 9,997.88 and 21,879 is: 47,879.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,997.88 : 21,879 = 21,879 : x
  2. Step 2: Convert to fraction form
    9,997.88/21,879 = 21,879/x
  3. Step 3: Cross multiply
    9,997.88x = 21,879 × 21,879
  4. Step 4: Simplify right side
    9,997.88x = 478,690,641
  5. Step 5: Solve for x
    x = 478,690,641/9,997.88
  6. Step 6: Final answer
    x = 47,879.24

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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.