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Finding the Fourth Proportional to 18,808.74, 25,956.90 and 10,743.10

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Solution

The fourth proportional to 18,808.74, 25,956.90 and 10,743.10 is: 14,825.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,808.74 : 25,956.90 = 10,743.10 : x
  2. Step 2: Convert to fraction form
    18,808.74/25,956.90 = 10,743.10/x
  3. Step 3: Cross multiply
    18,808.74x = 25,956.90 × 10,743.10
  4. Step 4: Simplify right side
    18,808.74x = 278,857,572.39
  5. Step 5: Solve for x
    x = 278,857,572.39/18,808.74
  6. Step 6: Final answer
    x = 14,825.96

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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.