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Finding the Fourth Proportional to 18,843.26, 28,264.88 and 8,311.03

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Solution

The fourth proportional to 18,843.26, 28,264.88 and 8,311.03 is: 12,466.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,843.26 : 28,264.88 = 8,311.03 : x
  2. Step 2: Convert to fraction form
    18,843.26/28,264.88 = 8,311.03/x
  3. Step 3: Cross multiply
    18,843.26x = 28,264.88 × 8,311.03
  4. Step 4: Simplify right side
    18,843.26x = 234,910,124.30
  5. Step 5: Solve for x
    x = 234,910,124.30/18,843.26
  6. Step 6: Final answer
    x = 12,466.54

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Similar ratio
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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.