Home / 11,991.28-17,971.52-5,741.92

Finding the Fourth Proportional to 11,991.28, 17,971.52 and 5,741.92

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Solution

The fourth proportional to 11,991.28, 17,971.52 and 5,741.92 is: 8,605.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,991.28 : 17,971.52 = 5,741.92 : x
  2. Step 2: Convert to fraction form
    11,991.28/17,971.52 = 5,741.92/x
  3. Step 3: Cross multiply
    11,991.28x = 17,971.52 × 5,741.92
  4. Step 4: Simplify right side
    11,991.28x = 103,191,001.41
  5. Step 5: Solve for x
    x = 103,191,001.41/11,991.28
  6. Step 6: Final answer
    x = 8,605.51

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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.