Home / 8,112.89-12,169.33-3,431.68

Finding the Fourth Proportional to 8,112.89, 12,169.33 and 3,431.68

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Solution

The fourth proportional to 8,112.89, 12,169.33 and 3,431.68 is: 5,147.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,112.89 : 12,169.33 = 3,431.68 : x
  2. Step 2: Convert to fraction form
    8,112.89/12,169.33 = 3,431.68/x
  3. Step 3: Cross multiply
    8,112.89x = 12,169.33 × 3,431.68
  4. Step 4: Simplify right side
    8,112.89x = 41,761,246.37
  5. Step 5: Solve for x
    x = 41,761,246.37/8,112.89
  6. Step 6: Final answer
    x = 5,147.52

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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.