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Finding the Third Proportional to 8,909.78 and 20,717.50

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Solution

The third proportional to 8,909.78 and 20,717.50 is: 48,173.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,909.78 : 20,717.50 = 20,717.50 : x
  2. Step 2: Convert to fraction form
    8,909.78/20,717.50 = 20,717.50/x
  3. Step 3: Cross multiply
    8,909.78x = 20,717.50 × 20,717.50
  4. Step 4: Simplify right side
    8,909.78x = 429,214,811.31
  5. Step 5: Solve for x
    x = 429,214,811.31/8,909.78
  6. Step 6: Final answer
    x = 48,173.43

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Why These Related Problems?

These problems maintain the same ratio (2.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.