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Finding the Fourth Proportional to 21,375.60, 32,064.12 and 6,584.40

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Solution

The fourth proportional to 21,375.60, 32,064.12 and 6,584.40 is: 9,876.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,375.60 : 32,064.12 = 6,584.40 : x
  2. Step 2: Convert to fraction form
    21,375.60/32,064.12 = 6,584.40/x
  3. Step 3: Cross multiply
    21,375.60x = 32,064.12 × 6,584.40
  4. Step 4: Simplify right side
    21,375.60x = 211,122,991.73
  5. Step 5: Solve for x
    x = 211,122,991.73/21,375.60
  6. Step 6: Final answer
    x = 9,876.82

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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.