Home / 3,917.24-5,399.74-2,921

Finding the Fourth Proportional to 3,917.24, 5,399.74 and 2,921

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Solution

The fourth proportional to 3,917.24, 5,399.74 and 2,921 is: 4,026.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.24 : 5,399.74 = 2,921 : x
  2. Step 2: Convert to fraction form
    3,917.24/5,399.74 = 2,921/x
  3. Step 3: Cross multiply
    3,917.24x = 5,399.74 × 2,921
  4. Step 4: Simplify right side
    3,917.24x = 15,772,640.54
  5. Step 5: Solve for x
    x = 15,772,640.54/3,917.24
  6. Step 6: Final answer
    x = 4,026.47

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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.