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Finding the Fourth Proportional to 39,388.50, 59,092.47 and 11,686.50

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Solution

The fourth proportional to 39,388.50, 59,092.47 and 11,686.50 is: 17,532.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,388.50 : 59,092.47 = 11,686.50 : x
  2. Step 2: Convert to fraction form
    39,388.50/59,092.47 = 11,686.50/x
  3. Step 3: Cross multiply
    39,388.50x = 59,092.47 × 11,686.50
  4. Step 4: Simplify right side
    39,388.50x = 690,584,150.66
  5. Step 5: Solve for x
    x = 690,584,150.66/39,388.50
  6. Step 6: Final answer
    x = 17,532.63

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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.