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Finding the Fourth Proportional to 18,793.32, 25,916.88 and 11,238.43

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Solution

The fourth proportional to 18,793.32, 25,916.88 and 11,238.43 is: 15,498.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,793.32 : 25,916.88 = 11,238.43 : x
  2. Step 2: Convert to fraction form
    18,793.32/25,916.88 = 11,238.43/x
  3. Step 3: Cross multiply
    18,793.32x = 25,916.88 × 11,238.43
  4. Step 4: Simplify right side
    18,793.32x = 291,264,912.11
  5. Step 5: Solve for x
    x = 291,264,912.11/18,793.32
  6. Step 6: Final answer
    x = 15,498.33

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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.