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Finding the Fourth Proportional to 18,611.12, 27,919.47 and 5,461.94

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Solution

The fourth proportional to 18,611.12, 27,919.47 and 5,461.94 is: 8,193.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,611.12 : 27,919.47 = 5,461.94 : x
  2. Step 2: Convert to fraction form
    18,611.12/27,919.47 = 5,461.94/x
  3. Step 3: Cross multiply
    18,611.12x = 27,919.47 × 5,461.94
  4. Step 4: Simplify right side
    18,611.12x = 152,494,469.97
  5. Step 5: Solve for x
    x = 152,494,469.97/18,611.12
  6. Step 6: Final answer
    x = 8,193.73

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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.