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Finding the Third Proportional to 3,987.75 and 8,745

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Solution

The third proportional to 3,987.75 and 8,745 is: 19,177.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.75 : 8,745 = 8,745 : x
  2. Step 2: Convert to fraction form
    3,987.75/8,745 = 8,745/x
  3. Step 3: Cross multiply
    3,987.75x = 8,745 × 8,745
  4. Step 4: Simplify right side
    3,987.75x = 76,475,025
  5. Step 5: Solve for x
    x = 76,475,025/3,987.75
  6. Step 6: Final answer
    x = 19,177.49

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.