Home / 8,129.53-12,187.81-3,198.25

Finding the Fourth Proportional to 8,129.53, 12,187.81 and 3,198.25

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Solution

The fourth proportional to 8,129.53, 12,187.81 and 3,198.25 is: 4,794.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,129.53 : 12,187.81 = 3,198.25 : x
  2. Step 2: Convert to fraction form
    8,129.53/12,187.81 = 3,198.25/x
  3. Step 3: Cross multiply
    8,129.53x = 12,187.81 × 3,198.25
  4. Step 4: Simplify right side
    8,129.53x = 38,979,663.33
  5. Step 5: Solve for x
    x = 38,979,663.33/8,129.53
  6. Step 6: Final answer
    x = 4,794.82

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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.