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Finding the Fourth Proportional to 21,591.88, 32,380.50 and 8,448.04

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Solution

The fourth proportional to 21,591.88, 32,380.50 and 8,448.04 is: 12,669.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,591.88 : 32,380.50 = 8,448.04 : x
  2. Step 2: Convert to fraction form
    21,591.88/32,380.50 = 8,448.04/x
  3. Step 3: Cross multiply
    21,591.88x = 32,380.50 × 8,448.04
  4. Step 4: Simplify right side
    21,591.88x = 273,551,759.22
  5. Step 5: Solve for x
    x = 273,551,759.22/21,591.88
  6. Step 6: Final answer
    x = 12,669.20

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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.