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Finding the Fourth Proportional to 39,788.40, 59,711.40 and 22,239.60

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Solution

The fourth proportional to 39,788.40, 59,711.40 and 22,239.60 is: 33,375.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,788.40 : 59,711.40 = 22,239.60 : x
  2. Step 2: Convert to fraction form
    39,788.40/59,711.40 = 22,239.60/x
  3. Step 3: Cross multiply
    39,788.40x = 59,711.40 × 22,239.60
  4. Step 4: Simplify right side
    39,788.40x = 1,327,957,651.44
  5. Step 5: Solve for x
    x = 1,327,957,651.44/39,788.40
  6. Step 6: Final answer
    x = 33,375.50

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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.