Home / 8,319.38-12,478.22-2,772.13

Finding the Fourth Proportional to 8,319.38, 12,478.22 and 2,772.13

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Solution

The fourth proportional to 8,319.38, 12,478.22 and 2,772.13 is: 4,157.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,319.38 : 12,478.22 = 2,772.13 : x
  2. Step 2: Convert to fraction form
    8,319.38/12,478.22 = 2,772.13/x
  3. Step 3: Cross multiply
    8,319.38x = 12,478.22 × 2,772.13
  4. Step 4: Simplify right side
    8,319.38x = 34,591,171.76
  5. Step 5: Solve for x
    x = 34,591,171.76/8,319.38
  6. Step 6: Final answer
    x = 4,157.90

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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.