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Finding the Third Proportional to 15,978 and 34,718

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Solution

The third proportional to 15,978 and 34,718 is: 75,437.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,978 : 34,718 = 34,718 : x
  2. Step 2: Convert to fraction form
    15,978/34,718 = 34,718/x
  3. Step 3: Cross multiply
    15,978x = 34,718 × 34,718
  4. Step 4: Simplify right side
    15,978x = 1,205,339,524
  5. Step 5: Solve for x
    x = 1,205,339,524/15,978
  6. Step 6: Final answer
    x = 75,437.45

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.