Home / 8,081.15-12,121.79-2,238.21

Finding the Fourth Proportional to 8,081.15, 12,121.79 and 2,238.21

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Solution

The fourth proportional to 8,081.15, 12,121.79 and 2,238.21 is: 3,357.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,081.15 : 12,121.79 = 2,238.21 : x
  2. Step 2: Convert to fraction form
    8,081.15/12,121.79 = 2,238.21/x
  3. Step 3: Cross multiply
    8,081.15x = 12,121.79 × 2,238.21
  4. Step 4: Simplify right side
    8,081.15x = 27,131,100.40
  5. Step 5: Solve for x
    x = 27,131,100.40/8,081.15
  6. Step 6: Final answer
    x = 3,357.33

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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.