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Finding the Fourth Proportional to 5,387.76, 8,080.20 and 3,631.74

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Solution

The fourth proportional to 5,387.76, 8,080.20 and 3,631.74 is: 5,446.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,387.76 : 8,080.20 = 3,631.74 : x
  2. Step 2: Convert to fraction form
    5,387.76/8,080.20 = 3,631.74/x
  3. Step 3: Cross multiply
    5,387.76x = 8,080.20 × 3,631.74
  4. Step 4: Simplify right side
    5,387.76x = 29,345,185.55
  5. Step 5: Solve for x
    x = 29,345,185.55/5,387.76
  6. Step 6: Final answer
    x = 5,446.64

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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.