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Finding the Fourth Proportional to 18,737.76, 25,831.31 and 11,562.87

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Solution

The fourth proportional to 18,737.76, 25,831.31 and 11,562.87 is: 15,940.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,737.76 : 25,831.31 = 11,562.87 : x
  2. Step 2: Convert to fraction form
    18,737.76/25,831.31 = 11,562.87/x
  3. Step 3: Cross multiply
    18,737.76x = 25,831.31 × 11,562.87
  4. Step 4: Simplify right side
    18,737.76x = 298,684,021.65
  5. Step 5: Solve for x
    x = 298,684,021.65/18,737.76
  6. Step 6: Final answer
    x = 15,940.22

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1.5x scale

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.