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Finding the Fourth Proportional to 19,906.60, 29,859.90 and 17,136.40

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Solution

The fourth proportional to 19,906.60, 29,859.90 and 17,136.40 is: 25,704.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,906.60 : 29,859.90 = 17,136.40 : x
  2. Step 2: Convert to fraction form
    19,906.60/29,859.90 = 17,136.40/x
  3. Step 3: Cross multiply
    19,906.60x = 29,859.90 × 17,136.40
  4. Step 4: Simplify right side
    19,906.60x = 511,691,190.36
  5. Step 5: Solve for x
    x = 511,691,190.36/19,906.60
  6. Step 6: Final answer
    x = 25,704.60

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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.