Home / 13,591.45-20,388.12-5,270.95

Finding the Fourth Proportional to 13,591.45, 20,388.12 and 5,270.95

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Solution

The fourth proportional to 13,591.45, 20,388.12 and 5,270.95 is: 7,906.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,591.45 : 20,388.12 = 5,270.95 : x
  2. Step 2: Convert to fraction form
    13,591.45/20,388.12 = 5,270.95/x
  3. Step 3: Cross multiply
    13,591.45x = 20,388.12 × 5,270.95
  4. Step 4: Simplify right side
    13,591.45x = 107,464,761.11
  5. Step 5: Solve for x
    x = 107,464,761.11/13,591.45
  6. Step 6: Final answer
    x = 7,906.79

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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.