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Finding the Third Proportional to 3,945.75 and 9,135.25

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Solution

The third proportional to 3,945.75 and 9,135.25 is: 21,150.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.75 : 9,135.25 = 9,135.25 : x
  2. Step 2: Convert to fraction form
    3,945.75/9,135.25 = 9,135.25/x
  3. Step 3: Cross multiply
    3,945.75x = 9,135.25 × 9,135.25
  4. Step 4: Simplify right side
    3,945.75x = 83,452,792.56
  5. Step 5: Solve for x
    x = 83,452,792.56/3,945.75
  6. Step 6: Final answer
    x = 21,150.05

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Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.