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Finding the Third Proportional to 4,105 and 8,978

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Solution

The third proportional to 4,105 and 8,978 is: 19,635.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,105 : 8,978 = 8,978 : x
  2. Step 2: Convert to fraction form
    4,105/8,978 = 8,978/x
  3. Step 3: Cross multiply
    4,105x = 8,978 × 8,978
  4. Step 4: Simplify right side
    4,105x = 80,604,484
  5. Step 5: Solve for x
    x = 80,604,484/4,105
  6. Step 6: Final answer
    x = 19,635.68

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.