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Finding the Fourth Proportional to 18,793.76, 25,939.70 and 11,718.84

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Solution

The fourth proportional to 18,793.76, 25,939.70 and 11,718.84 is: 16,174.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,793.76 : 25,939.70 = 11,718.84 : x
  2. Step 2: Convert to fraction form
    18,793.76/25,939.70 = 11,718.84/x
  3. Step 3: Cross multiply
    18,793.76x = 25,939.70 × 11,718.84
  4. Step 4: Simplify right side
    18,793.76x = 303,983,193.95
  5. Step 5: Solve for x
    x = 303,983,193.95/18,793.76
  6. Step 6: Final answer
    x = 16,174.69

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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.