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Finding the Fourth Proportional to 43,591.78, 65,397.36 and 15,889.78

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Solution

The fourth proportional to 43,591.78, 65,397.36 and 15,889.78 is: 23,838.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,591.78 : 65,397.36 = 15,889.78 : x
  2. Step 2: Convert to fraction form
    43,591.78/65,397.36 = 15,889.78/x
  3. Step 3: Cross multiply
    43,591.78x = 65,397.36 × 15,889.78
  4. Step 4: Simplify right side
    43,591.78x = 1,039,149,662.98
  5. Step 5: Solve for x
    x = 1,039,149,662.98/43,591.78
  6. Step 6: Final answer
    x = 23,838.20

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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.