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Finding the Fourth Proportional to 43,997.20, 65,979.60 and 21,803.20

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Solution

The fourth proportional to 43,997.20, 65,979.60 and 21,803.20 is: 32,696.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,997.20 : 65,979.60 = 21,803.20 : x
  2. Step 2: Convert to fraction form
    43,997.20/65,979.60 = 21,803.20/x
  3. Step 3: Cross multiply
    43,997.20x = 65,979.60 × 21,803.20
  4. Step 4: Simplify right side
    43,997.20x = 1,438,566,414.72
  5. Step 5: Solve for x
    x = 1,438,566,414.72/43,997.20
  6. Step 6: Final answer
    x = 32,696.77

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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.