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Finding the Fourth Proportional to 13,481.72, 20,213.04 and 5,154.72

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Solution

The fourth proportional to 13,481.72, 20,213.04 and 5,154.72 is: 7,728.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,481.72 : 20,213.04 = 5,154.72 : x
  2. Step 2: Convert to fraction form
    13,481.72/20,213.04 = 5,154.72/x
  3. Step 3: Cross multiply
    13,481.72x = 20,213.04 × 5,154.72
  4. Step 4: Simplify right side
    13,481.72x = 104,192,561.55
  5. Step 5: Solve for x
    x = 104,192,561.55/13,481.72
  6. Step 6: Final answer
    x = 7,728.43

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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.