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Finding the Fourth Proportional to 18,515.21, 25,550.91 and 10,017.32

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Solution

The fourth proportional to 18,515.21, 25,550.91 and 10,017.32 is: 13,823.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.21 : 25,550.91 = 10,017.32 : x
  2. Step 2: Convert to fraction form
    18,515.21/25,550.91 = 10,017.32/x
  3. Step 3: Cross multiply
    18,515.21x = 25,550.91 × 10,017.32
  4. Step 4: Simplify right side
    18,515.21x = 255,951,641.76
  5. Step 5: Solve for x
    x = 255,951,641.76/18,515.21
  6. Step 6: Final answer
    x = 13,823.86

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.