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Finding the Fourth Proportional to 18,793.96, 28,166.33 and 7,687.98

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Solution

The fourth proportional to 18,793.96, 28,166.33 and 7,687.98 is: 11,521.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,793.96 : 28,166.33 = 7,687.98 : x
  2. Step 2: Convert to fraction form
    18,793.96/28,166.33 = 7,687.98/x
  3. Step 3: Cross multiply
    18,793.96x = 28,166.33 × 7,687.98
  4. Step 4: Simplify right side
    18,793.96x = 216,542,200.93
  5. Step 5: Solve for x
    x = 216,542,200.93/18,793.96
  6. Step 6: Final answer
    x = 11,521.91

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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.