Home / 8,131.60-12,187.72-3,912.20

Finding the Fourth Proportional to 8,131.60, 12,187.72 and 3,912.20

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Solution

The fourth proportional to 8,131.60, 12,187.72 and 3,912.20 is: 5,863.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,131.60 : 12,187.72 = 3,912.20 : x
  2. Step 2: Convert to fraction form
    8,131.60/12,187.72 = 3,912.20/x
  3. Step 3: Cross multiply
    8,131.60x = 12,187.72 × 3,912.20
  4. Step 4: Simplify right side
    8,131.60x = 47,680,798.18
  5. Step 5: Solve for x
    x = 47,680,798.18/8,131.60
  6. Step 6: Final answer
    x = 5,863.64

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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.