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Finding the Fourth Proportional to 18,589.71, 27,866.79 and 11,905.68

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Solution

The fourth proportional to 18,589.71, 27,866.79 and 11,905.68 is: 17,847.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,589.71 : 27,866.79 = 11,905.68 : x
  2. Step 2: Convert to fraction form
    18,589.71/27,866.79 = 11,905.68/x
  3. Step 3: Cross multiply
    18,589.71x = 27,866.79 × 11,905.68
  4. Step 4: Simplify right side
    18,589.71x = 331,773,084.37
  5. Step 5: Solve for x
    x = 331,773,084.37/18,589.71
  6. Step 6: Final answer
    x = 17,847.14

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1.5x scale

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.