Home / 8,719.62-13,078.32-2,874.78

Finding the Fourth Proportional to 8,719.62, 13,078.32 and 2,874.78

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Solution

The fourth proportional to 8,719.62, 13,078.32 and 2,874.78 is: 4,311.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,719.62 : 13,078.32 = 2,874.78 : x
  2. Step 2: Convert to fraction form
    8,719.62/13,078.32 = 2,874.78/x
  3. Step 3: Cross multiply
    8,719.62x = 13,078.32 × 2,874.78
  4. Step 4: Simplify right side
    8,719.62x = 37,597,292.77
  5. Step 5: Solve for x
    x = 37,597,292.77/8,719.62
  6. Step 6: Final answer
    x = 4,311.80

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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.