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Finding the Fourth Proportional to 18,590.56, 27,871.26 and 8,724.76

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Solution

The fourth proportional to 18,590.56, 27,871.26 and 8,724.76 is: 13,080.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,590.56 : 27,871.26 = 8,724.76 : x
  2. Step 2: Convert to fraction form
    18,590.56/27,871.26 = 8,724.76/x
  3. Step 3: Cross multiply
    18,590.56x = 27,871.26 × 8,724.76
  4. Step 4: Simplify right side
    18,590.56x = 243,170,054.40
  5. Step 5: Solve for x
    x = 243,170,054.40/18,590.56
  6. Step 6: Final answer
    x = 13,080.30

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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.