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Finding the Fourth Proportional to 18,563.72, 27,855.16 and 12,328.04

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Solution

The fourth proportional to 18,563.72, 27,855.16 and 12,328.04 is: 18,498.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,563.72 : 27,855.16 = 12,328.04 : x
  2. Step 2: Convert to fraction form
    18,563.72/27,855.16 = 12,328.04/x
  3. Step 3: Cross multiply
    18,563.72x = 27,855.16 × 12,328.04
  4. Step 4: Simplify right side
    18,563.72x = 343,399,526.69
  5. Step 5: Solve for x
    x = 343,399,526.69/18,563.72
  6. Step 6: Final answer
    x = 18,498.42

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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.