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Finding the Fourth Proportional to 18,763.92, 25,893.84 and 10,380.42

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Solution

The fourth proportional to 18,763.92, 25,893.84 and 10,380.42 is: 14,324.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,763.92 : 25,893.84 = 10,380.42 : x
  2. Step 2: Convert to fraction form
    18,763.92/25,893.84 = 10,380.42/x
  3. Step 3: Cross multiply
    18,763.92x = 25,893.84 × 10,380.42
  4. Step 4: Simplify right side
    18,763.92x = 268,788,934.61
  5. Step 5: Solve for x
    x = 268,788,934.61/18,763.92
  6. Step 6: Final answer
    x = 14,324.78

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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.