Home / 8,112.07-12,172.91-3,431.83

Finding the Fourth Proportional to 8,112.07, 12,172.91 and 3,431.83

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Solution

The fourth proportional to 8,112.07, 12,172.91 and 3,431.83 is: 5,149.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,112.07 : 12,172.91 = 3,431.83 : x
  2. Step 2: Convert to fraction form
    8,112.07/12,172.91 = 3,431.83/x
  3. Step 3: Cross multiply
    8,112.07x = 12,172.91 × 3,431.83
  4. Step 4: Simplify right side
    8,112.07x = 41,775,357.73
  5. Step 5: Solve for x
    x = 41,775,357.73/8,112.07
  6. Step 6: Final answer
    x = 5,149.78

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1.5x scale

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.