Home / 3,105.68-4,284.41-2,163.78

Finding the Fourth Proportional to 3,105.68, 4,284.41 and 2,163.78

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Solution

The fourth proportional to 3,105.68, 4,284.41 and 2,163.78 is: 2,985.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.68 : 4,284.41 = 2,163.78 : x
  2. Step 2: Convert to fraction form
    3,105.68/4,284.41 = 2,163.78/x
  3. Step 3: Cross multiply
    3,105.68x = 4,284.41 × 2,163.78
  4. Step 4: Simplify right side
    3,105.68x = 9,270,509.85
  5. Step 5: Solve for x
    x = 9,270,509.85/3,105.68
  6. Step 6: Final answer
    x = 2,985.02

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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.