Home / 5,406.80-8,105.70-2,289.20

Finding the Fourth Proportional to 5,406.80, 8,105.70 and 2,289.20

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Solution

The fourth proportional to 5,406.80, 8,105.70 and 2,289.20 is: 3,431.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,406.80 : 8,105.70 = 2,289.20 : x
  2. Step 2: Convert to fraction form
    5,406.80/8,105.70 = 2,289.20/x
  3. Step 3: Cross multiply
    5,406.80x = 8,105.70 × 2,289.20
  4. Step 4: Simplify right side
    5,406.80x = 18,555,568.44
  5. Step 5: Solve for x
    x = 18,555,568.44/5,406.80
  6. Step 6: Final answer
    x = 3,431.89

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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.