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Finding the Fourth Proportional to 18,651.99, 27,982.73 and 6,965.31

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Solution

The fourth proportional to 18,651.99, 27,982.73 and 6,965.31 is: 10,449.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,651.99 : 27,982.73 = 6,965.31 : x
  2. Step 2: Convert to fraction form
    18,651.99/27,982.73 = 6,965.31/x
  3. Step 3: Cross multiply
    18,651.99x = 27,982.73 × 6,965.31
  4. Step 4: Simplify right side
    18,651.99x = 194,908,354.27
  5. Step 5: Solve for x
    x = 194,908,354.27/18,651.99
  6. Step 6: Final answer
    x = 10,449.74

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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.