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Finding the Fourth Proportional to 17,136.70, 25,668.60 and 11,231.80

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Solution

The fourth proportional to 17,136.70, 25,668.60 and 11,231.80 is: 16,823.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,136.70 : 25,668.60 = 11,231.80 : x
  2. Step 2: Convert to fraction form
    17,136.70/25,668.60 = 11,231.80/x
  3. Step 3: Cross multiply
    17,136.70x = 25,668.60 × 11,231.80
  4. Step 4: Simplify right side
    17,136.70x = 288,304,581.48
  5. Step 5: Solve for x
    x = 288,304,581.48/17,136.70
  6. Step 6: Final answer
    x = 16,823.81

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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.