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Finding the Fourth Proportional to 39,591, 59,391.36 and 11,889

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Solution

The fourth proportional to 39,591, 59,391.36 and 11,889 is: 17,834.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,591 : 59,391.36 = 11,889 : x
  2. Step 2: Convert to fraction form
    39,591/59,391.36 = 11,889/x
  3. Step 3: Cross multiply
    39,591x = 59,391.36 × 11,889
  4. Step 4: Simplify right side
    39,591x = 706,103,879.04
  5. Step 5: Solve for x
    x = 706,103,879.04/39,591
  6. Step 6: Final answer
    x = 17,834.96

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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.