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Finding the Fourth Proportional to 18,794.20, 28,158.90 and 8,912.20

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Solution

The fourth proportional to 18,794.20, 28,158.90 and 8,912.20 is: 13,352.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,794.20 : 28,158.90 = 8,912.20 : x
  2. Step 2: Convert to fraction form
    18,794.20/28,158.90 = 8,912.20/x
  3. Step 3: Cross multiply
    18,794.20x = 28,158.90 × 8,912.20
  4. Step 4: Simplify right side
    18,794.20x = 250,957,748.58
  5. Step 5: Solve for x
    x = 250,957,748.58/18,794.20
  6. Step 6: Final answer
    x = 13,352.94

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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.