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Finding the Fourth Proportional to 13,392.56, 18,481.95 and 7,424.48

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Solution

The fourth proportional to 13,392.56, 18,481.95 and 7,424.48 is: 10,245.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,392.56 : 18,481.95 = 7,424.48 : x
  2. Step 2: Convert to fraction form
    13,392.56/18,481.95 = 7,424.48/x
  3. Step 3: Cross multiply
    13,392.56x = 18,481.95 × 7,424.48
  4. Step 4: Simplify right side
    13,392.56x = 137,218,775.73
  5. Step 5: Solve for x
    x = 137,218,775.73/13,392.56
  6. Step 6: Final answer
    x = 10,245.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.