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Finding the Fourth Proportional to 28,336.70, 42,468.60 and 17,231.60

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Solution

The fourth proportional to 28,336.70, 42,468.60 and 17,231.60 is: 25,825.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,336.70 : 42,468.60 = 17,231.60 : x
  2. Step 2: Convert to fraction form
    28,336.70/42,468.60 = 17,231.60/x
  3. Step 3: Cross multiply
    28,336.70x = 42,468.60 × 17,231.60
  4. Step 4: Simplify right side
    28,336.70x = 731,801,927.76
  5. Step 5: Solve for x
    x = 731,801,927.76/28,336.70
  6. Step 6: Final answer
    x = 25,825.23

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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.