Home / 8,186.62-12,278.59-2,920.86

Finding the Fourth Proportional to 8,186.62, 12,278.59 and 2,920.86

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Solution

The fourth proportional to 8,186.62, 12,278.59 and 2,920.86 is: 4,380.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,186.62 : 12,278.59 = 2,920.86 : x
  2. Step 2: Convert to fraction form
    8,186.62/12,278.59 = 2,920.86/x
  3. Step 3: Cross multiply
    8,186.62x = 12,278.59 × 2,920.86
  4. Step 4: Simplify right side
    8,186.62x = 35,864,035.09
  5. Step 5: Solve for x
    x = 35,864,035.09/8,186.62
  6. Step 6: Final answer
    x = 4,380.81

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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.