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Finding the Fourth Proportional to 5,387.62, 8,041.94 and 4,991.85

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Solution

The fourth proportional to 5,387.62, 8,041.94 and 4,991.85 is: 7,451.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,387.62 : 8,041.94 = 4,991.85 : x
  2. Step 2: Convert to fraction form
    5,387.62/8,041.94 = 4,991.85/x
  3. Step 3: Cross multiply
    5,387.62x = 8,041.94 × 4,991.85
  4. Step 4: Simplify right side
    5,387.62x = 40,144,117.98
  5. Step 5: Solve for x
    x = 40,144,117.98/5,387.62
  6. Step 6: Final answer
    x = 7,451.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.