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Finding the Fourth Proportional to 8,481.24, 12,721.22 and 4,318.64

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Solution

The fourth proportional to 8,481.24, 12,721.22 and 4,318.64 is: 6,477.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,481.24 : 12,721.22 = 4,318.64 : x
  2. Step 2: Convert to fraction form
    8,481.24/12,721.22 = 4,318.64/x
  3. Step 3: Cross multiply
    8,481.24x = 12,721.22 × 4,318.64
  4. Step 4: Simplify right side
    8,481.24x = 54,938,369.54
  5. Step 5: Solve for x
    x = 54,938,369.54/8,481.24
  6. Step 6: Final answer
    x = 6,477.63

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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.