Home / 21,179.09-31,761.99-7,668.54

Finding the Fourth Proportional to 21,179.09, 31,761.99 and 7,668.54

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Solution

The fourth proportional to 21,179.09, 31,761.99 and 7,668.54 is: 11,500.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.09 : 31,761.99 = 7,668.54 : x
  2. Step 2: Convert to fraction form
    21,179.09/31,761.99 = 7,668.54/x
  3. Step 3: Cross multiply
    21,179.09x = 31,761.99 × 7,668.54
  4. Step 4: Simplify right side
    21,179.09x = 243,568,090.79
  5. Step 5: Solve for x
    x = 243,568,090.79/21,179.09
  6. Step 6: Final answer
    x = 11,500.41

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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.