Home / 7,991.24-11,987.75-2,148.31

Finding the Fourth Proportional to 7,991.24, 11,987.75 and 2,148.31

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Solution

The fourth proportional to 7,991.24, 11,987.75 and 2,148.31 is: 3,222.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.24 : 11,987.75 = 2,148.31 : x
  2. Step 2: Convert to fraction form
    7,991.24/11,987.75 = 2,148.31/x
  3. Step 3: Cross multiply
    7,991.24x = 11,987.75 × 2,148.31
  4. Step 4: Simplify right side
    7,991.24x = 25,753,403.20
  5. Step 5: Solve for x
    x = 25,753,403.20/7,991.24
  6. Step 6: Final answer
    x = 3,222.70

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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.