Home / 5,418.20-8,119.50-3,191.78

Finding the Fourth Proportional to 5,418.20, 8,119.50 and 3,191.78

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Solution

The fourth proportional to 5,418.20, 8,119.50 and 3,191.78 is: 4,783.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.20 : 8,119.50 = 3,191.78 : x
  2. Step 2: Convert to fraction form
    5,418.20/8,119.50 = 3,191.78/x
  3. Step 3: Cross multiply
    5,418.20x = 8,119.50 × 3,191.78
  4. Step 4: Simplify right side
    5,418.20x = 25,915,657.71
  5. Step 5: Solve for x
    x = 25,915,657.71/5,418.20
  6. Step 6: Final answer
    x = 4,783.08

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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.