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Finding the Fourth Proportional to 8,453.72, 12,679.97 and 3,774.15

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Solution

The fourth proportional to 8,453.72, 12,679.97 and 3,774.15 is: 5,660.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,453.72 : 12,679.97 = 3,774.15 : x
  2. Step 2: Convert to fraction form
    8,453.72/12,679.97 = 3,774.15/x
  3. Step 3: Cross multiply
    8,453.72x = 12,679.97 × 3,774.15
  4. Step 4: Simplify right side
    8,453.72x = 47,856,089.90
  5. Step 5: Solve for x
    x = 47,856,089.90/8,453.72
  6. Step 6: Final answer
    x = 5,660.95

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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.