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Finding the Fourth Proportional to 18,793.91, 28,190.84 and 8,261.42

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Solution

The fourth proportional to 18,793.91, 28,190.84 and 8,261.42 is: 12,392.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,793.91 : 28,190.84 = 8,261.42 : x
  2. Step 2: Convert to fraction form
    18,793.91/28,190.84 = 8,261.42/x
  3. Step 3: Cross multiply
    18,793.91x = 28,190.84 × 8,261.42
  4. Step 4: Simplify right side
    18,793.91x = 232,896,187.13
  5. Step 5: Solve for x
    x = 232,896,187.13/18,793.91
  6. Step 6: Final answer
    x = 12,392.11

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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.