Home / 5,440.40-8,170.20-3,981.20

Finding the Fourth Proportional to 5,440.40, 8,170.20 and 3,981.20

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Solution

The fourth proportional to 5,440.40, 8,170.20 and 3,981.20 is: 5,978.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,440.40 : 8,170.20 = 3,981.20 : x
  2. Step 2: Convert to fraction form
    5,440.40/8,170.20 = 3,981.20/x
  3. Step 3: Cross multiply
    5,440.40x = 8,170.20 × 3,981.20
  4. Step 4: Simplify right side
    5,440.40x = 32,527,200.24
  5. Step 5: Solve for x
    x = 32,527,200.24/5,440.40
  6. Step 6: Final answer
    x = 5,978.83

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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.