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Finding the Third Proportional to 8,356 and 19,930

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Solution

The third proportional to 8,356 and 19,930 is: 47,535.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,356 : 19,930 = 19,930 : x
  2. Step 2: Convert to fraction form
    8,356/19,930 = 19,930/x
  3. Step 3: Cross multiply
    8,356x = 19,930 × 19,930
  4. Step 4: Simplify right side
    8,356x = 397,204,900
  5. Step 5: Solve for x
    x = 397,204,900/8,356
  6. Step 6: Final answer
    x = 47,535.29

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Why These Related Problems?

These problems maintain the same ratio (2.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.