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Finding the Fourth Proportional to 13,799.98, 20,694.39 and 7,222.69

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Solution

The fourth proportional to 13,799.98, 20,694.39 and 7,222.69 is: 10,831.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,799.98 : 20,694.39 = 7,222.69 : x
  2. Step 2: Convert to fraction form
    13,799.98/20,694.39 = 7,222.69/x
  3. Step 3: Cross multiply
    13,799.98x = 20,694.39 × 7,222.69
  4. Step 4: Simplify right side
    13,799.98x = 149,469,163.71
  5. Step 5: Solve for x
    x = 149,469,163.71/13,799.98
  6. Step 6: Final answer
    x = 10,831.11

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1.5x scale

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.