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Finding the Fourth Proportional to 12,321.76, 18,481.20 and 4,925.92

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Solution

The fourth proportional to 12,321.76, 18,481.20 and 4,925.92 is: 7,388.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,321.76 : 18,481.20 = 4,925.92 : x
  2. Step 2: Convert to fraction form
    12,321.76/18,481.20 = 4,925.92/x
  3. Step 3: Cross multiply
    12,321.76x = 18,481.20 × 4,925.92
  4. Step 4: Simplify right side
    12,321.76x = 91,036,912.70
  5. Step 5: Solve for x
    x = 91,036,912.70/12,321.76
  6. Step 6: Final answer
    x = 7,388.30

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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.