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Finding the Third Proportional to 4,978 and 8,007

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Solution

The third proportional to 4,978 and 8,007 is: 12,879.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978 : 8,007 = 8,007 : x
  2. Step 2: Convert to fraction form
    4,978/8,007 = 8,007/x
  3. Step 3: Cross multiply
    4,978x = 8,007 × 8,007
  4. Step 4: Simplify right side
    4,978x = 64,112,049
  5. Step 5: Solve for x
    x = 64,112,049/4,978
  6. Step 6: Final answer
    x = 12,879.08

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.