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Finding the Fourth Proportional to 21,918.64, 32,892.60 and 8,067.64

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Solution

The fourth proportional to 21,918.64, 32,892.60 and 8,067.64 is: 12,106.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,918.64 : 32,892.60 = 8,067.64 : x
  2. Step 2: Convert to fraction form
    21,918.64/32,892.60 = 8,067.64/x
  3. Step 3: Cross multiply
    21,918.64x = 32,892.60 × 8,067.64
  4. Step 4: Simplify right side
    21,918.64x = 265,365,655.46
  5. Step 5: Solve for x
    x = 265,365,655.46/21,918.64
  6. Step 6: Final answer
    x = 12,106.85

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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.