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Finding the Fourth Proportional to 38,553.81, 57,831.12 and 13,589.21

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Solution

The fourth proportional to 38,553.81, 57,831.12 and 13,589.21 is: 20,383.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,553.81 : 57,831.12 = 13,589.21 : x
  2. Step 2: Convert to fraction form
    38,553.81/57,831.12 = 13,589.21/x
  3. Step 3: Cross multiply
    38,553.81x = 57,831.12 × 13,589.21
  4. Step 4: Simplify right side
    38,553.81x = 785,878,945.06
  5. Step 5: Solve for x
    x = 785,878,945.06/38,553.81
  6. Step 6: Final answer
    x = 20,383.95

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1.5x scale

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.