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Finding the Fourth Proportional to 8,138.41, 12,184.36 and 7,621.73

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Solution

The fourth proportional to 8,138.41, 12,184.36 and 7,621.73 is: 11,410.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,138.41 : 12,184.36 = 7,621.73 : x
  2. Step 2: Convert to fraction form
    8,138.41/12,184.36 = 7,621.73/x
  3. Step 3: Cross multiply
    8,138.41x = 12,184.36 × 7,621.73
  4. Step 4: Simplify right side
    8,138.41x = 92,865,902.14
  5. Step 5: Solve for x
    x = 92,865,902.14/8,138.41
  6. Step 6: Final answer
    x = 11,410.82

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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.