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Finding the Fourth Proportional to 12,791.60, 19,192.92 and 9,285.48

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Solution

The fourth proportional to 12,791.60, 19,192.92 and 9,285.48 is: 13,932.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,791.60 : 19,192.92 = 9,285.48 : x
  2. Step 2: Convert to fraction form
    12,791.60/19,192.92 = 9,285.48/x
  3. Step 3: Cross multiply
    12,791.60x = 19,192.92 × 9,285.48
  4. Step 4: Simplify right side
    12,791.60x = 178,215,474.80
  5. Step 5: Solve for x
    x = 178,215,474.80/12,791.60
  6. Step 6: Final answer
    x = 13,932.23

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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.