Home / 8,125.20-12,185.88-3,505.68

Finding the Fourth Proportional to 8,125.20, 12,185.88 and 3,505.68

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Solution

The fourth proportional to 8,125.20, 12,185.88 and 3,505.68 is: 5,257.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,125.20 : 12,185.88 = 3,505.68 : x
  2. Step 2: Convert to fraction form
    8,125.20/12,185.88 = 3,505.68/x
  3. Step 3: Cross multiply
    8,125.20x = 12,185.88 × 3,505.68
  4. Step 4: Simplify right side
    8,125.20x = 42,719,795.80
  5. Step 5: Solve for x
    x = 42,719,795.80/8,125.20
  6. Step 6: Final answer
    x = 5,257.69

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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.