Home / 3,913.55-5,400.66-2,145.15

Finding the Fourth Proportional to 3,913.55, 5,400.66 and 2,145.15

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Solution

The fourth proportional to 3,913.55, 5,400.66 and 2,145.15 is: 2,960.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,913.55 : 5,400.66 = 2,145.15 : x
  2. Step 2: Convert to fraction form
    3,913.55/5,400.66 = 2,145.15/x
  3. Step 3: Cross multiply
    3,913.55x = 5,400.66 × 2,145.15
  4. Step 4: Simplify right side
    3,913.55x = 11,585,198.80
  5. Step 5: Solve for x
    x = 11,585,198.80/3,913.55
  6. Step 6: Final answer
    x = 2,960.28

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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.