Home / 20,906.22-31,358.70-5,323.80

Finding the Fourth Proportional to 20,906.22, 31,358.70 and 5,323.80

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Solution

The fourth proportional to 20,906.22, 31,358.70 and 5,323.80 is: 7,985.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.22 : 31,358.70 = 5,323.80 : x
  2. Step 2: Convert to fraction form
    20,906.22/31,358.70 = 5,323.80/x
  3. Step 3: Cross multiply
    20,906.22x = 31,358.70 × 5,323.80
  4. Step 4: Simplify right side
    20,906.22x = 166,947,447.06
  5. Step 5: Solve for x
    x = 166,947,447.06/20,906.22
  6. Step 6: Final answer
    x = 7,985.54

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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.