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Finding the Fourth Proportional to 18,919.06, 28,396.10 and 9,565.68

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Solution

The fourth proportional to 18,919.06, 28,396.10 and 9,565.68 is: 14,357.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.06 : 28,396.10 = 9,565.68 : x
  2. Step 2: Convert to fraction form
    18,919.06/28,396.10 = 9,565.68/x
  3. Step 3: Cross multiply
    18,919.06x = 28,396.10 × 9,565.68
  4. Step 4: Simplify right side
    18,919.06x = 271,628,005.85
  5. Step 5: Solve for x
    x = 271,628,005.85/18,919.06
  6. Step 6: Final answer
    x = 14,357.37

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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.