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Finding the Third Proportional to 8,580 and 19,860

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Solution

The third proportional to 8,580 and 19,860 is: 45,969.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,580 : 19,860 = 19,860 : x
  2. Step 2: Convert to fraction form
    8,580/19,860 = 19,860/x
  3. Step 3: Cross multiply
    8,580x = 19,860 × 19,860
  4. Step 4: Simplify right side
    8,580x = 394,419,600
  5. Step 5: Solve for x
    x = 394,419,600/8,580
  6. Step 6: Final answer
    x = 45,969.65

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.