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Finding the Fourth Proportional to 18,695.61, 25,792.02 and 11,979.09

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Solution

The fourth proportional to 18,695.61, 25,792.02 and 11,979.09 is: 16,526.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,695.61 : 25,792.02 = 11,979.09 : x
  2. Step 2: Convert to fraction form
    18,695.61/25,792.02 = 11,979.09/x
  3. Step 3: Cross multiply
    18,695.61x = 25,792.02 × 11,979.09
  4. Step 4: Simplify right side
    18,695.61x = 308,964,928.86
  5. Step 5: Solve for x
    x = 308,964,928.86/18,695.61
  6. Step 6: Final answer
    x = 16,526.07

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Why These Related Problems?

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