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Finding the Fourth Proportional to 39,442.36, 59,163.90 and 13,147

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Solution

The fourth proportional to 39,442.36, 59,163.90 and 13,147 is: 19,720.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,442.36 : 59,163.90 = 13,147 : x
  2. Step 2: Convert to fraction form
    39,442.36/59,163.90 = 13,147/x
  3. Step 3: Cross multiply
    39,442.36x = 59,163.90 × 13,147
  4. Step 4: Simplify right side
    39,442.36x = 777,827,793.30
  5. Step 5: Solve for x
    x = 777,827,793.30/39,442.36
  6. Step 6: Final answer
    x = 19,720.62

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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.