Home / 3,928-5,421.36-2,272

Finding the Fourth Proportional to 3,928, 5,421.36 and 2,272

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Solution

The fourth proportional to 3,928, 5,421.36 and 2,272 is: 3,135.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928 : 5,421.36 = 2,272 : x
  2. Step 2: Convert to fraction form
    3,928/5,421.36 = 2,272/x
  3. Step 3: Cross multiply
    3,928x = 5,421.36 × 2,272
  4. Step 4: Simplify right side
    3,928x = 12,317,329.92
  5. Step 5: Solve for x
    x = 12,317,329.92/3,928
  6. Step 6: Final answer
    x = 3,135.78

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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.