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Finding the Third Proportional to 20,455.50 and 27,489

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Solution

The third proportional to 20,455.50 and 27,489 is: 36,940.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.50 : 27,489 = 27,489 : x
  2. Step 2: Convert to fraction form
    20,455.50/27,489 = 27,489/x
  3. Step 3: Cross multiply
    20,455.50x = 27,489 × 27,489
  4. Step 4: Simplify right side
    20,455.50x = 755,645,121
  5. Step 5: Solve for x
    x = 755,645,121/20,455.50
  6. Step 6: Final answer
    x = 36,940.93

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.