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Finding the Third Proportional to 5,082.75 and 7,855.31

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Solution

The third proportional to 5,082.75 and 7,855.31 is: 12,140.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,082.75 : 7,855.31 = 7,855.31 : x
  2. Step 2: Convert to fraction form
    5,082.75/7,855.31 = 7,855.31/x
  3. Step 3: Cross multiply
    5,082.75x = 7,855.31 × 7,855.31
  4. Step 4: Simplify right side
    5,082.75x = 61,705,934.47
  5. Step 5: Solve for x
    x = 61,705,934.47/5,082.75
  6. Step 6: Final answer
    x = 12,140.27

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.