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Finding the Fourth Proportional to 18,761.91, 28,153.91 and 6,924.01

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Solution

The fourth proportional to 18,761.91, 28,153.91 and 6,924.01 is: 10,390.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,761.91 : 28,153.91 = 6,924.01 : x
  2. Step 2: Convert to fraction form
    18,761.91/28,153.91 = 6,924.01/x
  3. Step 3: Cross multiply
    18,761.91x = 28,153.91 × 6,924.01
  4. Step 4: Simplify right side
    18,761.91x = 194,938,006.88
  5. Step 5: Solve for x
    x = 194,938,006.88/18,761.91
  6. Step 6: Final answer
    x = 10,390.09

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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.