Home / 8,125.47-12,180-3,198.57

Finding the Fourth Proportional to 8,125.47, 12,180 and 3,198.57

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Solution

The fourth proportional to 8,125.47, 12,180 and 3,198.57 is: 4,794.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,125.47 : 12,180 = 3,198.57 : x
  2. Step 2: Convert to fraction form
    8,125.47/12,180 = 3,198.57/x
  3. Step 3: Cross multiply
    8,125.47x = 12,180 × 3,198.57
  4. Step 4: Simplify right side
    8,125.47x = 38,958,582.60
  5. Step 5: Solve for x
    x = 38,958,582.60/8,125.47
  6. Step 6: Final answer
    x = 4,794.63

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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.