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Finding the Third Proportional to 8,719.50 and 18,615

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Solution

The third proportional to 8,719.50 and 18,615 is: 39,740.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,719.50 : 18,615 = 18,615 : x
  2. Step 2: Convert to fraction form
    8,719.50/18,615 = 18,615/x
  3. Step 3: Cross multiply
    8,719.50x = 18,615 × 18,615
  4. Step 4: Simplify right side
    8,719.50x = 346,518,225
  5. Step 5: Solve for x
    x = 346,518,225/8,719.50
  6. Step 6: Final answer
    x = 39,740.61

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.