Home / 2,758.11-4,138.71-2,143.05

Finding the Fourth Proportional to 2,758.11, 4,138.71 and 2,143.05

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Solution

The fourth proportional to 2,758.11, 4,138.71 and 2,143.05 is: 3,215.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,758.11 : 4,138.71 = 2,143.05 : x
  2. Step 2: Convert to fraction form
    2,758.11/4,138.71 = 2,143.05/x
  3. Step 3: Cross multiply
    2,758.11x = 4,138.71 × 2,143.05
  4. Step 4: Simplify right side
    2,758.11x = 8,869,462.47
  5. Step 5: Solve for x
    x = 8,869,462.47/2,758.11
  6. Step 6: Final answer
    x = 3,215.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.