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Finding the Fourth Proportional to 8,604.48, 12,905.28 and 3,408.96

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Solution

The fourth proportional to 8,604.48, 12,905.28 and 3,408.96 is: 5,112.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,604.48 : 12,905.28 = 3,408.96 : x
  2. Step 2: Convert to fraction form
    8,604.48/12,905.28 = 3,408.96/x
  3. Step 3: Cross multiply
    8,604.48x = 12,905.28 × 3,408.96
  4. Step 4: Simplify right side
    8,604.48x = 43,993,583.31
  5. Step 5: Solve for x
    x = 43,993,583.31/8,604.48
  6. Step 6: Final answer
    x = 5,112.87

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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.