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Finding the Fourth Proportional to 18,456.80, 27,668.72 and 8,060.32

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Solution

The fourth proportional to 18,456.80, 27,668.72 and 8,060.32 is: 12,083.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,456.80 : 27,668.72 = 8,060.32 : x
  2. Step 2: Convert to fraction form
    18,456.80/27,668.72 = 8,060.32/x
  3. Step 3: Cross multiply
    18,456.80x = 27,668.72 × 8,060.32
  4. Step 4: Simplify right side
    18,456.80x = 223,018,737.19
  5. Step 5: Solve for x
    x = 223,018,737.19/18,456.80
  6. Step 6: Final answer
    x = 12,083.28

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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.