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Finding the Fourth Proportional to 13,797.78, 20,699.41 and 5,481.72

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Solution

The fourth proportional to 13,797.78, 20,699.41 and 5,481.72 is: 8,223.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,797.78 : 20,699.41 = 5,481.72 : x
  2. Step 2: Convert to fraction form
    13,797.78/20,699.41 = 5,481.72/x
  3. Step 3: Cross multiply
    13,797.78x = 20,699.41 × 5,481.72
  4. Step 4: Simplify right side
    13,797.78x = 113,468,369.79
  5. Step 5: Solve for x
    x = 113,468,369.79/13,797.78
  6. Step 6: Final answer
    x = 8,223.67

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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.