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Finding the Fourth Proportional to 21,955.88, 32,933.82 and 8,104.88

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Solution

The fourth proportional to 21,955.88, 32,933.82 and 8,104.88 is: 12,157.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,955.88 : 32,933.82 = 8,104.88 : x
  2. Step 2: Convert to fraction form
    21,955.88/32,933.82 = 8,104.88/x
  3. Step 3: Cross multiply
    21,955.88x = 32,933.82 × 8,104.88
  4. Step 4: Simplify right side
    21,955.88x = 266,924,494.37
  5. Step 5: Solve for x
    x = 266,924,494.37/21,955.88
  6. Step 6: Final answer
    x = 12,157.32

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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.