Home / 8,327.28-12,491.49-2,780.40

Finding the Fourth Proportional to 8,327.28, 12,491.49 and 2,780.40

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Solution

The fourth proportional to 8,327.28, 12,491.49 and 2,780.40 is: 4,170.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,327.28 : 12,491.49 = 2,780.40 : x
  2. Step 2: Convert to fraction form
    8,327.28/12,491.49 = 2,780.40/x
  3. Step 3: Cross multiply
    8,327.28x = 12,491.49 × 2,780.40
  4. Step 4: Simplify right side
    8,327.28x = 34,731,338.80
  5. Step 5: Solve for x
    x = 34,731,338.80/8,327.28
  6. Step 6: Final answer
    x = 4,170.79

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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.