Home / 3,913.75-5,400.98-2,145.43

Finding the Fourth Proportional to 3,913.75, 5,400.98 and 2,145.43

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Solution

The fourth proportional to 3,913.75, 5,400.98 and 2,145.43 is: 2,960.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,913.75 : 5,400.98 = 2,145.43 : x
  2. Step 2: Convert to fraction form
    3,913.75/5,400.98 = 2,145.43/x
  3. Step 3: Cross multiply
    3,913.75x = 5,400.98 × 2,145.43
  4. Step 4: Simplify right side
    3,913.75x = 11,587,424.52
  5. Step 5: Solve for x
    x = 11,587,424.52/3,913.75
  6. Step 6: Final answer
    x = 2,960.70

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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.