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Finding the Fourth Proportional to 43,940.80, 65,932.80 and 20,563.20

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Solution

The fourth proportional to 43,940.80, 65,932.80 and 20,563.20 is: 30,854.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,940.80 : 65,932.80 = 20,563.20 : x
  2. Step 2: Convert to fraction form
    43,940.80/65,932.80 = 20,563.20/x
  3. Step 3: Cross multiply
    43,940.80x = 65,932.80 × 20,563.20
  4. Step 4: Simplify right side
    43,940.80x = 1,355,789,352.96
  5. Step 5: Solve for x
    x = 1,355,789,352.96/43,940.80
  6. Step 6: Final answer
    x = 30,854.91

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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.