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Finding the Fourth Proportional to 11,791.78, 17,679.03 and 10,072.42

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Solution

The fourth proportional to 11,791.78, 17,679.03 and 10,072.42 is: 15,101.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,791.78 : 17,679.03 = 10,072.42 : x
  2. Step 2: Convert to fraction form
    11,791.78/17,679.03 = 10,072.42/x
  3. Step 3: Cross multiply
    11,791.78x = 17,679.03 × 10,072.42
  4. Step 4: Simplify right side
    11,791.78x = 178,070,615.35
  5. Step 5: Solve for x
    x = 178,070,615.35/11,791.78
  6. Step 6: Final answer
    x = 15,101.25

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1.5x scale

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.