Home / 8,128.96-12,198.46-3,197.76

Finding the Fourth Proportional to 8,128.96, 12,198.46 and 3,197.76

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Solution

The fourth proportional to 8,128.96, 12,198.46 and 3,197.76 is: 4,798.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.96 : 12,198.46 = 3,197.76 : x
  2. Step 2: Convert to fraction form
    8,128.96/12,198.46 = 3,197.76/x
  3. Step 3: Cross multiply
    8,128.96x = 12,198.46 × 3,197.76
  4. Step 4: Simplify right side
    8,128.96x = 39,007,747.45
  5. Step 5: Solve for x
    x = 39,007,747.45/8,128.96
  6. Step 6: Final answer
    x = 4,798.61

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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.