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Finding the Fourth Proportional to 11,993.16, 17,991.90 and 5,422.44

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Solution

The fourth proportional to 11,993.16, 17,991.90 and 5,422.44 is: 8,134.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,993.16 : 17,991.90 = 5,422.44 : x
  2. Step 2: Convert to fraction form
    11,993.16/17,991.90 = 5,422.44/x
  3. Step 3: Cross multiply
    11,993.16x = 17,991.90 × 5,422.44
  4. Step 4: Simplify right side
    11,993.16x = 97,559,998.24
  5. Step 5: Solve for x
    x = 97,559,998.24/11,993.16
  6. Step 6: Final answer
    x = 8,134.64

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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.