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Finding the Fourth Proportional to 13,362.54, 20,021.92 and 7,115.92

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Solution

The fourth proportional to 13,362.54, 20,021.92 and 7,115.92 is: 10,662.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,362.54 : 20,021.92 = 7,115.92 : x
  2. Step 2: Convert to fraction form
    13,362.54/20,021.92 = 7,115.92/x
  3. Step 3: Cross multiply
    13,362.54x = 20,021.92 × 7,115.92
  4. Step 4: Simplify right side
    13,362.54x = 142,474,380.97
  5. Step 5: Solve for x
    x = 142,474,380.97/13,362.54
  6. Step 6: Final answer
    x = 10,662.22

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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.