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Finding the Third Proportional to 8,505 and 18,405

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Solution

The third proportional to 8,505 and 18,405 is: 39,828.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,505 : 18,405 = 18,405 : x
  2. Step 2: Convert to fraction form
    8,505/18,405 = 18,405/x
  3. Step 3: Cross multiply
    8,505x = 18,405 × 18,405
  4. Step 4: Simplify right side
    8,505x = 338,744,025
  5. Step 5: Solve for x
    x = 338,744,025/8,505
  6. Step 6: Final answer
    x = 39,828.81

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.