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Finding the Fourth Proportional to 13,906.74, 20,863.20 and 4,046.80

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Solution

The fourth proportional to 13,906.74, 20,863.20 and 4,046.80 is: 6,071.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,906.74 : 20,863.20 = 4,046.80 : x
  2. Step 2: Convert to fraction form
    13,906.74/20,863.20 = 4,046.80/x
  3. Step 3: Cross multiply
    13,906.74x = 20,863.20 × 4,046.80
  4. Step 4: Simplify right side
    13,906.74x = 84,429,197.76
  5. Step 5: Solve for x
    x = 84,429,197.76/13,906.74
  6. Step 6: Final answer
    x = 6,071.10

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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.