Home / 2,139.05-3,204.39-1,906.85

Finding the Fourth Proportional to 2,139.05, 3,204.39 and 1,906.85

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Solution

The fourth proportional to 2,139.05, 3,204.39 and 1,906.85 is: 2,856.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.05 : 3,204.39 = 1,906.85 : x
  2. Step 2: Convert to fraction form
    2,139.05/3,204.39 = 1,906.85/x
  3. Step 3: Cross multiply
    2,139.05x = 3,204.39 × 1,906.85
  4. Step 4: Simplify right side
    2,139.05x = 6,110,291.07
  5. Step 5: Solve for x
    x = 6,110,291.07/2,139.05
  6. Step 6: Final answer
    x = 2,856.54

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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.