Home / 20,782.80-31,174.38-5,991.75

Finding the Fourth Proportional to 20,782.80, 31,174.38 and 5,991.75

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Solution

The fourth proportional to 20,782.80, 31,174.38 and 5,991.75 is: 8,987.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.80 : 31,174.38 = 5,991.75 : x
  2. Step 2: Convert to fraction form
    20,782.80/31,174.38 = 5,991.75/x
  3. Step 3: Cross multiply
    20,782.80x = 31,174.38 × 5,991.75
  4. Step 4: Simplify right side
    20,782.80x = 186,789,091.37
  5. Step 5: Solve for x
    x = 186,789,091.37/20,782.80
  6. Step 6: Final answer
    x = 8,987.68

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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.