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Finding the Third Proportional to 3,942 and 8,583.75

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Solution

The third proportional to 3,942 and 8,583.75 is: 18,691.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,942 : 8,583.75 = 8,583.75 : x
  2. Step 2: Convert to fraction form
    3,942/8,583.75 = 8,583.75/x
  3. Step 3: Cross multiply
    3,942x = 8,583.75 × 8,583.75
  4. Step 4: Simplify right side
    3,942x = 73,680,764.06
  5. Step 5: Solve for x
    x = 73,680,764.06/3,942
  6. Step 6: Final answer
    x = 18,691.21

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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.