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Finding the Fourth Proportional to 21,583.40, 32,372.88 and 6,791.88

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Solution

The fourth proportional to 21,583.40, 32,372.88 and 6,791.88 is: 10,187.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,583.40 : 32,372.88 = 6,791.88 : x
  2. Step 2: Convert to fraction form
    21,583.40/32,372.88 = 6,791.88/x
  3. Step 3: Cross multiply
    21,583.40x = 32,372.88 × 6,791.88
  4. Step 4: Simplify right side
    21,583.40x = 219,872,716.21
  5. Step 5: Solve for x
    x = 219,872,716.21/21,583.40
  6. Step 6: Final answer
    x = 10,187.12

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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.