Home / 12,791.48-17,654.46-8,078.36

Finding the Fourth Proportional to 12,791.48, 17,654.46 and 8,078.36

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Solution

The fourth proportional to 12,791.48, 17,654.46 and 8,078.36 is: 11,149.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,791.48 : 17,654.46 = 8,078.36 : x
  2. Step 2: Convert to fraction form
    12,791.48/17,654.46 = 8,078.36/x
  3. Step 3: Cross multiply
    12,791.48x = 17,654.46 × 8,078.36
  4. Step 4: Simplify right side
    12,791.48x = 142,619,083.49
  5. Step 5: Solve for x
    x = 142,619,083.49/12,791.48
  6. Step 6: Final answer
    x = 11,149.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.