Home / 5,479.70-8,219.55-3,138.80

Finding the Fourth Proportional to 5,479.70, 8,219.55 and 3,138.80

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Solution

The fourth proportional to 5,479.70, 8,219.55 and 3,138.80 is: 4,708.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,479.70 : 8,219.55 = 3,138.80 : x
  2. Step 2: Convert to fraction form
    5,479.70/8,219.55 = 3,138.80/x
  3. Step 3: Cross multiply
    5,479.70x = 8,219.55 × 3,138.80
  4. Step 4: Simplify right side
    5,479.70x = 25,799,523.54
  5. Step 5: Solve for x
    x = 25,799,523.54/5,479.70
  6. Step 6: Final answer
    x = 4,708.20

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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.