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Finding the Fourth Proportional to 18,793.40, 28,187.16 and 8,261.09

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Solution

The fourth proportional to 18,793.40, 28,187.16 and 8,261.09 is: 12,390.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,793.40 : 28,187.16 = 8,261.09 : x
  2. Step 2: Convert to fraction form
    18,793.40/28,187.16 = 8,261.09/x
  3. Step 3: Cross multiply
    18,793.40x = 28,187.16 × 8,261.09
  4. Step 4: Simplify right side
    18,793.40x = 232,856,665.60
  5. Step 5: Solve for x
    x = 232,856,665.60/18,793.40
  6. Step 6: Final answer
    x = 12,390.34

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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.