Home / 5,179.70-7,147.85-2,821.86

Finding the Fourth Proportional to 5,179.70, 7,147.85 and 2,821.86

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Solution

The fourth proportional to 5,179.70, 7,147.85 and 2,821.86 is: 3,894.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.70 : 7,147.85 = 2,821.86 : x
  2. Step 2: Convert to fraction form
    5,179.70/7,147.85 = 2,821.86/x
  3. Step 3: Cross multiply
    5,179.70x = 7,147.85 × 2,821.86
  4. Step 4: Simplify right side
    5,179.70x = 20,170,217.89
  5. Step 5: Solve for x
    x = 20,170,217.89/5,179.70
  6. Step 6: Final answer
    x = 3,894.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.