Home / 20,825.91-31,251.08-7,687.44

Finding the Fourth Proportional to 20,825.91, 31,251.08 and 7,687.44

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Solution

The fourth proportional to 20,825.91, 31,251.08 and 7,687.44 is: 11,535.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,825.91 : 31,251.08 = 7,687.44 : x
  2. Step 2: Convert to fraction form
    20,825.91/31,251.08 = 7,687.44/x
  3. Step 3: Cross multiply
    20,825.91x = 31,251.08 × 7,687.44
  4. Step 4: Simplify right side
    20,825.91x = 240,240,821.65
  5. Step 5: Solve for x
    x = 240,240,821.65/20,825.91
  6. Step 6: Final answer
    x = 11,535.67

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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.