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Finding the Third Proportional to 5,413 and 8,509

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Solution

The third proportional to 5,413 and 8,509 is: 13,375.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,413 : 8,509 = 8,509 : x
  2. Step 2: Convert to fraction form
    5,413/8,509 = 8,509/x
  3. Step 3: Cross multiply
    5,413x = 8,509 × 8,509
  4. Step 4: Simplify right side
    5,413x = 72,403,081
  5. Step 5: Solve for x
    x = 72,403,081/5,413
  6. Step 6: Final answer
    x = 13,375.78

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.