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Finding the Fourth Proportional to 28,704.01, 43,015.92 and 13,909

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Solution

The fourth proportional to 28,704.01, 43,015.92 and 13,909 is: 20,844.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,704.01 : 43,015.92 = 13,909 : x
  2. Step 2: Convert to fraction form
    28,704.01/43,015.92 = 13,909/x
  3. Step 3: Cross multiply
    28,704.01x = 43,015.92 × 13,909
  4. Step 4: Simplify right side
    28,704.01x = 598,308,431.28
  5. Step 5: Solve for x
    x = 598,308,431.28/28,704.01
  6. Step 6: Final answer
    x = 20,844.07

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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.