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Finding the Fourth Proportional to 18,471.29, 25,488.41 and 10,917.95

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Solution

The fourth proportional to 18,471.29, 25,488.41 and 10,917.95 is: 15,065.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,471.29 : 25,488.41 = 10,917.95 : x
  2. Step 2: Convert to fraction form
    18,471.29/25,488.41 = 10,917.95/x
  3. Step 3: Cross multiply
    18,471.29x = 25,488.41 × 10,917.95
  4. Step 4: Simplify right side
    18,471.29x = 278,281,003.93
  5. Step 5: Solve for x
    x = 278,281,003.93/18,471.29
  6. Step 6: Final answer
    x = 15,065.60

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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.