Home / 8,139.62-12,212.17-3,206.59

Finding the Fourth Proportional to 8,139.62, 12,212.17 and 3,206.59

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Solution

The fourth proportional to 8,139.62, 12,212.17 and 3,206.59 is: 4,810.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.62 : 12,212.17 = 3,206.59 : x
  2. Step 2: Convert to fraction form
    8,139.62/12,212.17 = 3,206.59/x
  3. Step 3: Cross multiply
    8,139.62x = 12,212.17 × 3,206.59
  4. Step 4: Simplify right side
    8,139.62x = 39,159,383.65
  5. Step 5: Solve for x
    x = 39,159,383.65/8,139.62
  6. Step 6: Final answer
    x = 4,810.96

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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.