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Finding the Fourth Proportional to 55,011.72, 82,544.87 and 21,755.64

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Solution

The fourth proportional to 55,011.72, 82,544.87 and 21,755.64 is: 32,644.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,011.72 : 82,544.87 = 21,755.64 : x
  2. Step 2: Convert to fraction form
    55,011.72/82,544.87 = 21,755.64/x
  3. Step 3: Cross multiply
    55,011.72x = 82,544.87 × 21,755.64
  4. Step 4: Simplify right side
    55,011.72x = 1,795,815,954.06
  5. Step 5: Solve for x
    x = 1,795,815,954.06/55,011.72
  6. Step 6: Final answer
    x = 32,644.25

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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.