Home / 20,866.25-31,311.68-7,727.85

Finding the Fourth Proportional to 20,866.25, 31,311.68 and 7,727.85

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Solution

The fourth proportional to 20,866.25, 31,311.68 and 7,727.85 is: 11,596.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.25 : 31,311.68 = 7,727.85 : x
  2. Step 2: Convert to fraction form
    20,866.25/31,311.68 = 7,727.85/x
  3. Step 3: Cross multiply
    20,866.25x = 31,311.68 × 7,727.85
  4. Step 4: Simplify right side
    20,866.25x = 241,971,927.65
  5. Step 5: Solve for x
    x = 241,971,927.65/20,866.25
  6. Step 6: Final answer
    x = 11,596.33

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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.