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Finding the Fourth Proportional to 21,996.73, 30,355.15 and 11,925

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Solution

The fourth proportional to 21,996.73, 30,355.15 and 11,925 is: 16,456.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,996.73 : 30,355.15 = 11,925 : x
  2. Step 2: Convert to fraction form
    21,996.73/30,355.15 = 11,925/x
  3. Step 3: Cross multiply
    21,996.73x = 30,355.15 × 11,925
  4. Step 4: Simplify right side
    21,996.73x = 361,985,163.75
  5. Step 5: Solve for x
    x = 361,985,163.75/21,996.73
  6. Step 6: Final answer
    x = 16,456.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.