Home / 21,268.54-31,904.99-8,131.96

Finding the Fourth Proportional to 21,268.54, 31,904.99 and 8,131.96

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Solution

The fourth proportional to 21,268.54, 31,904.99 and 8,131.96 is: 12,198.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,268.54 : 31,904.99 = 8,131.96 : x
  2. Step 2: Convert to fraction form
    21,268.54/31,904.99 = 8,131.96/x
  3. Step 3: Cross multiply
    21,268.54x = 31,904.99 × 8,131.96
  4. Step 4: Simplify right side
    21,268.54x = 259,449,902.30
  5. Step 5: Solve for x
    x = 259,449,902.30/21,268.54
  6. Step 6: Final answer
    x = 12,198.77

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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.