Home / 21,301.74-31,930.97-8,828.55

Finding the Fourth Proportional to 21,301.74, 31,930.97 and 8,828.55

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Solution

The fourth proportional to 21,301.74, 31,930.97 and 8,828.55 is: 13,233.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,301.74 : 31,930.97 = 8,828.55 : x
  2. Step 2: Convert to fraction form
    21,301.74/31,930.97 = 8,828.55/x
  3. Step 3: Cross multiply
    21,301.74x = 31,930.97 × 8,828.55
  4. Step 4: Simplify right side
    21,301.74x = 281,904,121.05
  5. Step 5: Solve for x
    x = 281,904,121.05/21,301.74
  6. Step 6: Final answer
    x = 13,233.85

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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.