Home / 20,806.97-31,195.87-7,657.63

Finding the Fourth Proportional to 20,806.97, 31,195.87 and 7,657.63

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Solution

The fourth proportional to 20,806.97, 31,195.87 and 7,657.63 is: 11,481.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.97 : 31,195.87 = 7,657.63 : x
  2. Step 2: Convert to fraction form
    20,806.97/31,195.87 = 7,657.63/x
  3. Step 3: Cross multiply
    20,806.97x = 31,195.87 × 7,657.63
  4. Step 4: Simplify right side
    20,806.97x = 238,886,332.85
  5. Step 5: Solve for x
    x = 238,886,332.85/20,806.97
  6. Step 6: Final answer
    x = 11,481.08

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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.