Home / 8,115.57-12,173.81-3,959.12

Finding the Fourth Proportional to 8,115.57, 12,173.81 and 3,959.12

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Solution

The fourth proportional to 8,115.57, 12,173.81 and 3,959.12 is: 5,938.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.57 : 12,173.81 = 3,959.12 : x
  2. Step 2: Convert to fraction form
    8,115.57/12,173.81 = 3,959.12/x
  3. Step 3: Cross multiply
    8,115.57x = 12,173.81 × 3,959.12
  4. Step 4: Simplify right side
    8,115.57x = 48,197,585.29
  5. Step 5: Solve for x
    x = 48,197,585.29/8,115.57
  6. Step 6: Final answer
    x = 5,938.90

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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.