Home / 20,715.75-31,046.22-7,555.41

Finding the Fourth Proportional to 20,715.75, 31,046.22 and 7,555.41

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Solution

The fourth proportional to 20,715.75, 31,046.22 and 7,555.41 is: 11,323.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.75 : 31,046.22 = 7,555.41 : x
  2. Step 2: Convert to fraction form
    20,715.75/31,046.22 = 7,555.41/x
  3. Step 3: Cross multiply
    20,715.75x = 31,046.22 × 7,555.41
  4. Step 4: Simplify right side
    20,715.75x = 234,566,921.05
  5. Step 5: Solve for x
    x = 234,566,921.05/20,715.75
  6. Step 6: Final answer
    x = 11,323.12

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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.