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Finding the Fourth Proportional to 11,991.88, 17,987.82 and 5,071.24

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Solution

The fourth proportional to 11,991.88, 17,987.82 and 5,071.24 is: 7,606.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,991.88 : 17,987.82 = 5,071.24 : x
  2. Step 2: Convert to fraction form
    11,991.88/17,987.82 = 5,071.24/x
  3. Step 3: Cross multiply
    11,991.88x = 17,987.82 × 5,071.24
  4. Step 4: Simplify right side
    11,991.88x = 91,220,552.30
  5. Step 5: Solve for x
    x = 91,220,552.30/11,991.88
  6. Step 6: Final answer
    x = 7,606.86

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Similar ratio
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1.5x scale

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.