Home / 8,139.11-12,200.42-3,212.21

Finding the Fourth Proportional to 8,139.11, 12,200.42 and 3,212.21

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Solution

The fourth proportional to 8,139.11, 12,200.42 and 3,212.21 is: 4,815.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.11 : 12,200.42 = 3,212.21 : x
  2. Step 2: Convert to fraction form
    8,139.11/12,200.42 = 3,212.21/x
  3. Step 3: Cross multiply
    8,139.11x = 12,200.42 × 3,212.21
  4. Step 4: Simplify right side
    8,139.11x = 39,190,349.66
  5. Step 5: Solve for x
    x = 39,190,349.66/8,139.11
  6. Step 6: Final answer
    x = 4,815.07

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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.