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Finding the Third Proportional to 5,387.25 and 8,278.59

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Solution

The third proportional to 5,387.25 and 8,278.59 is: 12,721.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,387.25 : 8,278.59 = 8,278.59 : x
  2. Step 2: Convert to fraction form
    5,387.25/8,278.59 = 8,278.59/x
  3. Step 3: Cross multiply
    5,387.25x = 8,278.59 × 8,278.59
  4. Step 4: Simplify right side
    5,387.25x = 68,535,114.48
  5. Step 5: Solve for x
    x = 68,535,114.48/5,387.25
  6. Step 6: Final answer
    x = 12,721.73

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.