Home / 6,811.90-9,400.12-3,979.54

Finding the Fourth Proportional to 6,811.90, 9,400.12 and 3,979.54

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Solution

The fourth proportional to 6,811.90, 9,400.12 and 3,979.54 is: 5,491.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,811.90 : 9,400.12 = 3,979.54 : x
  2. Step 2: Convert to fraction form
    6,811.90/9,400.12 = 3,979.54/x
  3. Step 3: Cross multiply
    6,811.90x = 9,400.12 × 3,979.54
  4. Step 4: Simplify right side
    6,811.90x = 37,408,135.02
  5. Step 5: Solve for x
    x = 37,408,135.02/6,811.90
  6. Step 6: Final answer
    x = 5,491.59

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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.