Home / 3,874.21-5,346.29-2,105.82

Finding the Fourth Proportional to 3,874.21, 5,346.29 and 2,105.82

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Solution

The fourth proportional to 3,874.21, 5,346.29 and 2,105.82 is: 2,905.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,874.21 : 5,346.29 = 2,105.82 : x
  2. Step 2: Convert to fraction form
    3,874.21/5,346.29 = 2,105.82/x
  3. Step 3: Cross multiply
    3,874.21x = 5,346.29 × 2,105.82
  4. Step 4: Simplify right side
    3,874.21x = 11,258,324.41
  5. Step 5: Solve for x
    x = 11,258,324.41/3,874.21
  6. Step 6: Final answer
    x = 2,905.97

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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.