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Finding the Fourth Proportional to 43,889.45, 65,843.28 and 18,930.92

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Solution

The fourth proportional to 43,889.45, 65,843.28 and 18,930.92 is: 28,400.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,889.45 : 65,843.28 = 18,930.92 : x
  2. Step 2: Convert to fraction form
    43,889.45/65,843.28 = 18,930.92/x
  3. Step 3: Cross multiply
    43,889.45x = 65,843.28 × 18,930.92
  4. Step 4: Simplify right side
    43,889.45x = 1,246,473,537.00
  5. Step 5: Solve for x
    x = 1,246,473,537.00/43,889.45
  6. Step 6: Final answer
    x = 28,400.30

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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.