Home / 7,821.99-11,732.03-3,141.81

Finding the Fourth Proportional to 7,821.99, 11,732.03 and 3,141.81

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Solution

The fourth proportional to 7,821.99, 11,732.03 and 3,141.81 is: 4,712.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.99 : 11,732.03 = 3,141.81 : x
  2. Step 2: Convert to fraction form
    7,821.99/11,732.03 = 3,141.81/x
  3. Step 3: Cross multiply
    7,821.99x = 11,732.03 × 3,141.81
  4. Step 4: Simplify right side
    7,821.99x = 36,859,805.25
  5. Step 5: Solve for x
    x = 36,859,805.25/7,821.99
  6. Step 6: Final answer
    x = 4,712.33

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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.