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Finding the Fourth Proportional to 8,956.74, 13,435.11 and 3,408.78

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Solution

The fourth proportional to 8,956.74, 13,435.11 and 3,408.78 is: 5,113.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,956.74 : 13,435.11 = 3,408.78 : x
  2. Step 2: Convert to fraction form
    8,956.74/13,435.11 = 3,408.78/x
  3. Step 3: Cross multiply
    8,956.74x = 13,435.11 × 3,408.78
  4. Step 4: Simplify right side
    8,956.74x = 45,797,334.27
  5. Step 5: Solve for x
    x = 45,797,334.27/8,956.74
  6. Step 6: Final answer
    x = 5,113.17

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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.