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Finding the Fourth Proportional to 13,993.96, 20,976.54 and 5,223.40

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Solution

The fourth proportional to 13,993.96, 20,976.54 and 5,223.40 is: 7,829.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,993.96 : 20,976.54 = 5,223.40 : x
  2. Step 2: Convert to fraction form
    13,993.96/20,976.54 = 5,223.40/x
  3. Step 3: Cross multiply
    13,993.96x = 20,976.54 × 5,223.40
  4. Step 4: Simplify right side
    13,993.96x = 109,568,859.04
  5. Step 5: Solve for x
    x = 109,568,859.04/13,993.96
  6. Step 6: Final answer
    x = 7,829.73

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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.