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Finding the Third Proportional to 8,115.75 and 17,687.25

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Solution

The third proportional to 8,115.75 and 17,687.25 is: 38,547.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.75 : 17,687.25 = 17,687.25 : x
  2. Step 2: Convert to fraction form
    8,115.75/17,687.25 = 17,687.25/x
  3. Step 3: Cross multiply
    8,115.75x = 17,687.25 × 17,687.25
  4. Step 4: Simplify right side
    8,115.75x = 312,838,812.56
  5. Step 5: Solve for x
    x = 312,838,812.56/8,115.75
  6. Step 6: Final answer
    x = 38,547.12

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.