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Finding the Third Proportional to 8,605 and 11,815.50

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Solution

The third proportional to 8,605 and 11,815.50 is: 16,223.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605 : 11,815.50 = 11,815.50 : x
  2. Step 2: Convert to fraction form
    8,605/11,815.50 = 11,815.50/x
  3. Step 3: Cross multiply
    8,605x = 11,815.50 × 11,815.50
  4. Step 4: Simplify right side
    8,605x = 139,606,040.25
  5. Step 5: Solve for x
    x = 139,606,040.25/8,605
  6. Step 6: Final answer
    x = 16,223.83

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.