Home / 3,911.15-5,396.05-2,231.35

Finding the Fourth Proportional to 3,911.15, 5,396.05 and 2,231.35

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Solution

The fourth proportional to 3,911.15, 5,396.05 and 2,231.35 is: 3,078.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.15 : 5,396.05 = 2,231.35 : x
  2. Step 2: Convert to fraction form
    3,911.15/5,396.05 = 2,231.35/x
  3. Step 3: Cross multiply
    3,911.15x = 5,396.05 × 2,231.35
  4. Step 4: Simplify right side
    3,911.15x = 12,040,465.47
  5. Step 5: Solve for x
    x = 12,040,465.47/3,911.15
  6. Step 6: Final answer
    x = 3,078.50

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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.