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Finding the Third Proportional to 8,821.50 and 18,856

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Solution

The third proportional to 8,821.50 and 18,856 is: 40,304.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,821.50 : 18,856 = 18,856 : x
  2. Step 2: Convert to fraction form
    8,821.50/18,856 = 18,856/x
  3. Step 3: Cross multiply
    8,821.50x = 18,856 × 18,856
  4. Step 4: Simplify right side
    8,821.50x = 355,548,736
  5. Step 5: Solve for x
    x = 355,548,736/8,821.50
  6. Step 6: Final answer
    x = 40,304.79

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.