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Finding the Fourth Proportional to 18,091.92, 24,959.16 and 12,791.28

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Solution

The fourth proportional to 18,091.92, 24,959.16 and 12,791.28 is: 17,646.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,091.92 : 24,959.16 = 12,791.28 : x
  2. Step 2: Convert to fraction form
    18,091.92/24,959.16 = 12,791.28/x
  3. Step 3: Cross multiply
    18,091.92x = 24,959.16 × 12,791.28
  4. Step 4: Simplify right side
    18,091.92x = 319,259,604.12
  5. Step 5: Solve for x
    x = 319,259,604.12/18,091.92
  6. Step 6: Final answer
    x = 17,646.53

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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.