Home / 7,987.96-11,981.82-2,793.88

Finding the Fourth Proportional to 7,987.96, 11,981.82 and 2,793.88

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Solution

The fourth proportional to 7,987.96, 11,981.82 and 2,793.88 is: 4,190.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,987.96 : 11,981.82 = 2,793.88 : x
  2. Step 2: Convert to fraction form
    7,987.96/11,981.82 = 2,793.88/x
  3. Step 3: Cross multiply
    7,987.96x = 11,981.82 × 2,793.88
  4. Step 4: Simplify right side
    7,987.96x = 33,475,767.26
  5. Step 5: Solve for x
    x = 33,475,767.26/7,987.96
  6. Step 6: Final answer
    x = 4,190.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.