Home / 7,997.81-11,991.59-3,321.05

Finding the Fourth Proportional to 7,997.81, 11,991.59 and 3,321.05

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Solution

The fourth proportional to 7,997.81, 11,991.59 and 3,321.05 is: 4,979.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,997.81 : 11,991.59 = 3,321.05 : x
  2. Step 2: Convert to fraction form
    7,997.81/11,991.59 = 3,321.05/x
  3. Step 3: Cross multiply
    7,997.81x = 11,991.59 × 3,321.05
  4. Step 4: Simplify right side
    7,997.81x = 39,824,663.97
  5. Step 5: Solve for x
    x = 39,824,663.97/7,997.81
  6. Step 6: Final answer
    x = 4,979.44

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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.