Home / 8,115.88-12,168.58-3,186.01

Finding the Fourth Proportional to 8,115.88, 12,168.58 and 3,186.01

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Solution

The fourth proportional to 8,115.88, 12,168.58 and 3,186.01 is: 4,776.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.88 : 12,168.58 = 3,186.01 : x
  2. Step 2: Convert to fraction form
    8,115.88/12,168.58 = 3,186.01/x
  3. Step 3: Cross multiply
    8,115.88x = 12,168.58 × 3,186.01
  4. Step 4: Simplify right side
    8,115.88x = 38,769,217.57
  5. Step 5: Solve for x
    x = 38,769,217.57/8,115.88
  6. Step 6: Final answer
    x = 4,776.96

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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.