Home / 3,917.23-5,400.78-2,856.54

Finding the Fourth Proportional to 3,917.23, 5,400.78 and 2,856.54

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Solution

The fourth proportional to 3,917.23, 5,400.78 and 2,856.54 is: 3,938.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.23 : 5,400.78 = 2,856.54 : x
  2. Step 2: Convert to fraction form
    3,917.23/5,400.78 = 2,856.54/x
  3. Step 3: Cross multiply
    3,917.23x = 5,400.78 × 2,856.54
  4. Step 4: Simplify right side
    3,917.23x = 15,427,544.10
  5. Step 5: Solve for x
    x = 15,427,544.10/3,917.23
  6. Step 6: Final answer
    x = 3,938.38

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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.