Home / 6,391.20-8,819.46-3,738.45

Finding the Fourth Proportional to 6,391.20, 8,819.46 and 3,738.45

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Solution

The fourth proportional to 6,391.20, 8,819.46 and 3,738.45 is: 5,158.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,391.20 : 8,819.46 = 3,738.45 : x
  2. Step 2: Convert to fraction form
    6,391.20/8,819.46 = 3,738.45/x
  3. Step 3: Cross multiply
    6,391.20x = 8,819.46 × 3,738.45
  4. Step 4: Simplify right side
    6,391.20x = 32,971,110.24
  5. Step 5: Solve for x
    x = 32,971,110.24/6,391.20
  6. Step 6: Final answer
    x = 5,158.83

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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.