Home / 21,991.17-32,992.20-6,408.75

Finding the Fourth Proportional to 21,991.17, 32,992.20 and 6,408.75

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Solution

The fourth proportional to 21,991.17, 32,992.20 and 6,408.75 is: 9,614.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,991.17 : 32,992.20 = 6,408.75 : x
  2. Step 2: Convert to fraction form
    21,991.17/32,992.20 = 6,408.75/x
  3. Step 3: Cross multiply
    21,991.17x = 32,992.20 × 6,408.75
  4. Step 4: Simplify right side
    21,991.17x = 211,438,761.75
  5. Step 5: Solve for x
    x = 211,438,761.75/21,991.17
  6. Step 6: Final answer
    x = 9,614.71

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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.