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Finding the Fourth Proportional to 18,833.55, 28,235.72 and 10,923.90

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Solution

The fourth proportional to 18,833.55, 28,235.72 and 10,923.90 is: 16,377.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,833.55 : 28,235.72 = 10,923.90 : x
  2. Step 2: Convert to fraction form
    18,833.55/28,235.72 = 10,923.90/x
  3. Step 3: Cross multiply
    18,833.55x = 28,235.72 × 10,923.90
  4. Step 4: Simplify right side
    18,833.55x = 308,444,127.09
  5. Step 5: Solve for x
    x = 308,444,127.09/18,833.55
  6. Step 6: Final answer
    x = 16,377.38

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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.