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Finding the Fourth Proportional to 18,585.65, 27,886.64 and 8,724.08

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Solution

The fourth proportional to 18,585.65, 27,886.64 and 8,724.08 is: 13,089.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,585.65 : 27,886.64 = 8,724.08 : x
  2. Step 2: Convert to fraction form
    18,585.65/27,886.64 = 8,724.08/x
  3. Step 3: Cross multiply
    18,585.65x = 27,886.64 × 8,724.08
  4. Step 4: Simplify right side
    18,585.65x = 243,285,095.24
  5. Step 5: Solve for x
    x = 243,285,095.24/18,585.65
  6. Step 6: Final answer
    x = 13,089.95

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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.