Home / 3,905.91-5,388.26-2,661.75

Finding the Fourth Proportional to 3,905.91, 5,388.26 and 2,661.75

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Solution

The fourth proportional to 3,905.91, 5,388.26 and 2,661.75 is: 3,671.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.91 : 5,388.26 = 2,661.75 : x
  2. Step 2: Convert to fraction form
    3,905.91/5,388.26 = 2,661.75/x
  3. Step 3: Cross multiply
    3,905.91x = 5,388.26 × 2,661.75
  4. Step 4: Simplify right side
    3,905.91x = 14,342,187.75
  5. Step 5: Solve for x
    x = 14,342,187.75/3,905.91
  6. Step 6: Final answer
    x = 3,671.92

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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.