Home / 3,911.85-5,399.31-3,281.40

Finding the Fourth Proportional to 3,911.85, 5,399.31 and 3,281.40

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Solution

The fourth proportional to 3,911.85, 5,399.31 and 3,281.40 is: 4,529.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.85 : 5,399.31 = 3,281.40 : x
  2. Step 2: Convert to fraction form
    3,911.85/5,399.31 = 3,281.40/x
  3. Step 3: Cross multiply
    3,911.85x = 5,399.31 × 3,281.40
  4. Step 4: Simplify right side
    3,911.85x = 17,717,295.83
  5. Step 5: Solve for x
    x = 17,717,295.83/3,911.85
  6. Step 6: Final answer
    x = 4,529.13

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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.