Home / 3,923.87-5,414.82-2,155.37

Finding the Fourth Proportional to 3,923.87, 5,414.82 and 2,155.37

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Solution

The fourth proportional to 3,923.87, 5,414.82 and 2,155.37 is: 2,974.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,923.87 : 5,414.82 = 2,155.37 : x
  2. Step 2: Convert to fraction form
    3,923.87/5,414.82 = 2,155.37/x
  3. Step 3: Cross multiply
    3,923.87x = 5,414.82 × 2,155.37
  4. Step 4: Simplify right side
    3,923.87x = 11,670,913.51
  5. Step 5: Solve for x
    x = 11,670,913.51/3,923.87
  6. Step 6: Final answer
    x = 2,974.34

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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.