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Finding the Third Proportional to 8,678 and 20,480

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Solution

The third proportional to 8,678 and 20,480 is: 48,332.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,678 : 20,480 = 20,480 : x
  2. Step 2: Convert to fraction form
    8,678/20,480 = 20,480/x
  3. Step 3: Cross multiply
    8,678x = 20,480 × 20,480
  4. Step 4: Simplify right side
    8,678x = 419,430,400
  5. Step 5: Solve for x
    x = 419,430,400/8,678
  6. Step 6: Final answer
    x = 48,332.61

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Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.