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Finding the Fourth Proportional to 7,991.31, 11,992.44 and 2,797.20

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Solution

The fourth proportional to 7,991.31, 11,992.44 and 2,797.20 is: 4,197.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.31 : 11,992.44 = 2,797.20 : x
  2. Step 2: Convert to fraction form
    7,991.31/11,992.44 = 2,797.20/x
  3. Step 3: Cross multiply
    7,991.31x = 11,992.44 × 2,797.20
  4. Step 4: Simplify right side
    7,991.31x = 33,545,253.17
  5. Step 5: Solve for x
    x = 33,545,253.17/7,991.31
  6. Step 6: Final answer
    x = 4,197.72

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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.