Home / 3,923.58-5,414.81-2,155.21

Finding the Fourth Proportional to 3,923.58, 5,414.81 and 2,155.21

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Solution

The fourth proportional to 3,923.58, 5,414.81 and 2,155.21 is: 2,974.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,923.58 : 5,414.81 = 2,155.21 : x
  2. Step 2: Convert to fraction form
    3,923.58/5,414.81 = 2,155.21/x
  3. Step 3: Cross multiply
    3,923.58x = 5,414.81 × 2,155.21
  4. Step 4: Simplify right side
    3,923.58x = 11,670,040.47
  5. Step 5: Solve for x
    x = 11,670,040.47/3,923.58
  6. Step 6: Final answer
    x = 2,974.33

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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.