Home / 5,639.47-8,462.39-2,131.85

Finding the Fourth Proportional to 5,639.47, 8,462.39 and 2,131.85

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Solution

The fourth proportional to 5,639.47, 8,462.39 and 2,131.85 is: 3,198.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.47 : 8,462.39 = 2,131.85 : x
  2. Step 2: Convert to fraction form
    5,639.47/8,462.39 = 2,131.85/x
  3. Step 3: Cross multiply
    5,639.47x = 8,462.39 × 2,131.85
  4. Step 4: Simplify right side
    5,639.47x = 18,040,556.62
  5. Step 5: Solve for x
    x = 18,040,556.62/5,639.47
  6. Step 6: Final answer
    x = 3,198.98

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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.