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Finding the Fourth Proportional to 8,511.12, 12,775.05 and 5,591.52

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Solution

The fourth proportional to 8,511.12, 12,775.05 and 5,591.52 is: 8,392.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,511.12 : 12,775.05 = 5,591.52 : x
  2. Step 2: Convert to fraction form
    8,511.12/12,775.05 = 5,591.52/x
  3. Step 3: Cross multiply
    8,511.12x = 12,775.05 × 5,591.52
  4. Step 4: Simplify right side
    8,511.12x = 71,431,947.58
  5. Step 5: Solve for x
    x = 71,431,947.58/8,511.12
  6. Step 6: Final answer
    x = 8,392.78

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1.5x scale

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.