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Finding the Fourth Proportional to 43,889.30, 65,843.83 and 13,905.34

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Solution

The fourth proportional to 43,889.30, 65,843.83 and 13,905.34 is: 20,861.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,889.30 : 65,843.83 = 13,905.34 : x
  2. Step 2: Convert to fraction form
    43,889.30/65,843.83 = 13,905.34/x
  3. Step 3: Cross multiply
    43,889.30x = 65,843.83 × 13,905.34
  4. Step 4: Simplify right side
    43,889.30x = 915,580,890.59
  5. Step 5: Solve for x
    x = 915,580,890.59/43,889.30
  6. Step 6: Final answer
    x = 20,861.14

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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.