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Finding the Fourth Proportional to 5,781.80, 8,672.70 and 4,226.60

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Solution

The fourth proportional to 5,781.80, 8,672.70 and 4,226.60 is: 6,339.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,781.80 : 8,672.70 = 4,226.60 : x
  2. Step 2: Convert to fraction form
    5,781.80/8,672.70 = 4,226.60/x
  3. Step 3: Cross multiply
    5,781.80x = 8,672.70 × 4,226.60
  4. Step 4: Simplify right side
    5,781.80x = 36,656,033.82
  5. Step 5: Solve for x
    x = 36,656,033.82/5,781.80
  6. Step 6: Final answer
    x = 6,339.90

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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.