Home / 5,286.37-7,928.94-1,391.08

Finding the Fourth Proportional to 5,286.37, 7,928.94 and 1,391.08

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Solution

The fourth proportional to 5,286.37, 7,928.94 and 1,391.08 is: 2,086.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,286.37 : 7,928.94 = 1,391.08 : x
  2. Step 2: Convert to fraction form
    5,286.37/7,928.94 = 1,391.08/x
  3. Step 3: Cross multiply
    5,286.37x = 7,928.94 × 1,391.08
  4. Step 4: Simplify right side
    5,286.37x = 11,029,789.86
  5. Step 5: Solve for x
    x = 11,029,789.86/5,286.37
  6. Step 6: Final answer
    x = 2,086.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.