Home / 3,923.40-5,414.31-2,155.02

Finding the Fourth Proportional to 3,923.40, 5,414.31 and 2,155.02

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Solution

The fourth proportional to 3,923.40, 5,414.31 and 2,155.02 is: 2,973.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,923.40 : 5,414.31 = 2,155.02 : x
  2. Step 2: Convert to fraction form
    3,923.40/5,414.31 = 2,155.02/x
  3. Step 3: Cross multiply
    3,923.40x = 5,414.31 × 2,155.02
  4. Step 4: Simplify right side
    3,923.40x = 11,667,946.34
  5. Step 5: Solve for x
    x = 11,667,946.34/3,923.40
  6. Step 6: Final answer
    x = 2,973.94

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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.