Home / 20,873.11-31,309.62-5,290.69

Finding the Fourth Proportional to 20,873.11, 31,309.62 and 5,290.69

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Solution

The fourth proportional to 20,873.11, 31,309.62 and 5,290.69 is: 7,936.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,873.11 : 31,309.62 = 5,290.69 : x
  2. Step 2: Convert to fraction form
    20,873.11/31,309.62 = 5,290.69/x
  3. Step 3: Cross multiply
    20,873.11x = 31,309.62 × 5,290.69
  4. Step 4: Simplify right side
    20,873.11x = 165,649,493.44
  5. Step 5: Solve for x
    x = 165,649,493.44/20,873.11
  6. Step 6: Final answer
    x = 7,936.02

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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.