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Finding the Fourth Proportional to 21,584.80, 32,338.80 and 18,512.80

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Solution

The fourth proportional to 21,584.80, 32,338.80 and 18,512.80 is: 27,736.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,584.80 : 32,338.80 = 18,512.80 : x
  2. Step 2: Convert to fraction form
    21,584.80/32,338.80 = 18,512.80/x
  3. Step 3: Cross multiply
    21,584.80x = 32,338.80 × 18,512.80
  4. Step 4: Simplify right side
    21,584.80x = 598,681,736.64
  5. Step 5: Solve for x
    x = 598,681,736.64/21,584.80
  6. Step 6: Final answer
    x = 27,736.27

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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.