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Finding the Fourth Proportional to 5,591.74, 8,387.70 and 2,821.90

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Solution

The fourth proportional to 5,591.74, 8,387.70 and 2,821.90 is: 4,232.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,591.74 : 8,387.70 = 2,821.90 : x
  2. Step 2: Convert to fraction form
    5,591.74/8,387.70 = 2,821.90/x
  3. Step 3: Cross multiply
    5,591.74x = 8,387.70 × 2,821.90
  4. Step 4: Simplify right side
    5,591.74x = 23,669,250.63
  5. Step 5: Solve for x
    x = 23,669,250.63/5,591.74
  6. Step 6: Final answer
    x = 4,232.90

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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.