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Finding the Fourth Proportional to 18,061.73, 24,869.81 and 15,811.01

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Solution

The fourth proportional to 18,061.73, 24,869.81 and 15,811.01 is: 21,770.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,061.73 : 24,869.81 = 15,811.01 : x
  2. Step 2: Convert to fraction form
    18,061.73/24,869.81 = 15,811.01/x
  3. Step 3: Cross multiply
    18,061.73x = 24,869.81 × 15,811.01
  4. Step 4: Simplify right side
    18,061.73x = 393,216,735.55
  5. Step 5: Solve for x
    x = 393,216,735.55/18,061.73
  6. Step 6: Final answer
    x = 21,770.71

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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.