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Finding the Fourth Proportional to 28,906.86, 43,380 and 13,324.62

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Solution

The fourth proportional to 28,906.86, 43,380 and 13,324.62 is: 19,996.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,906.86 : 43,380 = 13,324.62 : x
  2. Step 2: Convert to fraction form
    28,906.86/43,380 = 13,324.62/x
  3. Step 3: Cross multiply
    28,906.86x = 43,380 × 13,324.62
  4. Step 4: Simplify right side
    28,906.86x = 578,022,015.60
  5. Step 5: Solve for x
    x = 578,022,015.60/28,906.86
  6. Step 6: Final answer
    x = 19,996.02

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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.