Home / 21,272.09-31,904.01-8,121.33

Finding the Fourth Proportional to 21,272.09, 31,904.01 and 8,121.33

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Solution

The fourth proportional to 21,272.09, 31,904.01 and 8,121.33 is: 12,180.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.09 : 31,904.01 = 8,121.33 : x
  2. Step 2: Convert to fraction form
    21,272.09/31,904.01 = 8,121.33/x
  3. Step 3: Cross multiply
    21,272.09x = 31,904.01 × 8,121.33
  4. Step 4: Simplify right side
    21,272.09x = 259,102,993.53
  5. Step 5: Solve for x
    x = 259,102,993.53/21,272.09
  6. Step 6: Final answer
    x = 12,180.42

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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.