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Finding the Fourth Proportional to 39,455.78, 59,191.94 and 11,375.78

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Solution

The fourth proportional to 39,455.78, 59,191.94 and 11,375.78 is: 17,066.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,455.78 : 59,191.94 = 11,375.78 : x
  2. Step 2: Convert to fraction form
    39,455.78/59,191.94 = 11,375.78/x
  3. Step 3: Cross multiply
    39,455.78x = 59,191.94 × 11,375.78
  4. Step 4: Simplify right side
    39,455.78x = 673,354,219.69
  5. Step 5: Solve for x
    x = 673,354,219.69/39,455.78
  6. Step 6: Final answer
    x = 17,066.05

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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.