Home / 8,209.15-12,315.33-2,942.75

Finding the Fourth Proportional to 8,209.15, 12,315.33 and 2,942.75

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Solution

The fourth proportional to 8,209.15, 12,315.33 and 2,942.75 is: 4,414.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,209.15 : 12,315.33 = 2,942.75 : x
  2. Step 2: Convert to fraction form
    8,209.15/12,315.33 = 2,942.75/x
  3. Step 3: Cross multiply
    8,209.15x = 12,315.33 × 2,942.75
  4. Step 4: Simplify right side
    8,209.15x = 36,240,891.86
  5. Step 5: Solve for x
    x = 36,240,891.86/8,209.15
  6. Step 6: Final answer
    x = 4,414.70

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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.