Home / 8,112.68-12,175.85-3,185.78

Finding the Fourth Proportional to 8,112.68, 12,175.85 and 3,185.78

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Solution

The fourth proportional to 8,112.68, 12,175.85 and 3,185.78 is: 4,781.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,112.68 : 12,175.85 = 3,185.78 : x
  2. Step 2: Convert to fraction form
    8,112.68/12,175.85 = 3,185.78/x
  3. Step 3: Cross multiply
    8,112.68x = 12,175.85 × 3,185.78
  4. Step 4: Simplify right side
    8,112.68x = 38,789,502.60
  5. Step 5: Solve for x
    x = 38,789,502.60/8,112.68
  6. Step 6: Final answer
    x = 4,781.35

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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.