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Finding the Third Proportional to 4,978 and 7,923

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Solution

The third proportional to 4,978 and 7,923 is: 12,610.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978 : 7,923 = 7,923 : x
  2. Step 2: Convert to fraction form
    4,978/7,923 = 7,923/x
  3. Step 3: Cross multiply
    4,978x = 7,923 × 7,923
  4. Step 4: Simplify right side
    4,978x = 62,773,929
  5. Step 5: Solve for x
    x = 62,773,929/4,978
  6. Step 6: Final answer
    x = 12,610.27

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.