Home / 20,716.35-31,057.52-8,231.01

Finding the Fourth Proportional to 20,716.35, 31,057.52 and 8,231.01

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Solution

The fourth proportional to 20,716.35, 31,057.52 and 8,231.01 is: 12,339.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.35 : 31,057.52 = 8,231.01 : x
  2. Step 2: Convert to fraction form
    20,716.35/31,057.52 = 8,231.01/x
  3. Step 3: Cross multiply
    20,716.35x = 31,057.52 × 8,231.01
  4. Step 4: Simplify right side
    20,716.35x = 255,634,716.54
  5. Step 5: Solve for x
    x = 255,634,716.54/20,716.35
  6. Step 6: Final answer
    x = 12,339.76

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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.