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Finding the Fourth Proportional to 21,991.71, 32,992.25 and 6,408.03

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Solution

The fourth proportional to 21,991.71, 32,992.25 and 6,408.03 is: 9,613.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,991.71 : 32,992.25 = 6,408.03 : x
  2. Step 2: Convert to fraction form
    21,991.71/32,992.25 = 6,408.03/x
  3. Step 3: Cross multiply
    21,991.71x = 32,992.25 × 6,408.03
  4. Step 4: Simplify right side
    21,991.71x = 211,415,295.73
  5. Step 5: Solve for x
    x = 211,415,295.73/21,991.71
  6. Step 6: Final answer
    x = 9,613.41

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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.