Home / 20,806.22-31,194.74-7,656.88

Finding the Fourth Proportional to 20,806.22, 31,194.74 and 7,656.88

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Solution

The fourth proportional to 20,806.22, 31,194.74 and 7,656.88 is: 11,479.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.22 : 31,194.74 = 7,656.88 : x
  2. Step 2: Convert to fraction form
    20,806.22/31,194.74 = 7,656.88/x
  3. Step 3: Cross multiply
    20,806.22x = 31,194.74 × 7,656.88
  4. Step 4: Simplify right side
    20,806.22x = 238,854,321.97
  5. Step 5: Solve for x
    x = 238,854,321.97/20,806.22
  6. Step 6: Final answer
    x = 11,479.95

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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.