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Finding the Fourth Proportional to 25,942.05, 38,908.98 and 8,407.79

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Solution

The fourth proportional to 25,942.05, 38,908.98 and 8,407.79 is: 12,610.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,942.05 : 38,908.98 = 8,407.79 : x
  2. Step 2: Convert to fraction form
    25,942.05/38,908.98 = 8,407.79/x
  3. Step 3: Cross multiply
    25,942.05x = 38,908.98 × 8,407.79
  4. Step 4: Simplify right side
    25,942.05x = 327,138,338.41
  5. Step 5: Solve for x
    x = 327,138,338.41/25,942.05
  6. Step 6: Final answer
    x = 12,610.35

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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.