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Finding the Third Proportional to 3,999.75 and 8,679.75

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Solution

The third proportional to 3,999.75 and 8,679.75 is: 18,835.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.75 : 8,679.75 = 8,679.75 : x
  2. Step 2: Convert to fraction form
    3,999.75/8,679.75 = 8,679.75/x
  3. Step 3: Cross multiply
    3,999.75x = 8,679.75 × 8,679.75
  4. Step 4: Simplify right side
    3,999.75x = 75,338,060.06
  5. Step 5: Solve for x
    x = 75,338,060.06/3,999.75
  6. Step 6: Final answer
    x = 18,835.69

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.