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Finding the Third Proportional to 5,485 and 8,471

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Solution

The third proportional to 5,485 and 8,471 is: 13,082.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,485 : 8,471 = 8,471 : x
  2. Step 2: Convert to fraction form
    5,485/8,471 = 8,471/x
  3. Step 3: Cross multiply
    5,485x = 8,471 × 8,471
  4. Step 4: Simplify right side
    5,485x = 71,757,841
  5. Step 5: Solve for x
    x = 71,757,841/5,485
  6. Step 6: Final answer
    x = 13,082.56

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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.