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Finding the Fourth Proportional to 18,042.80, 27,064.20 and 8,179.28

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Solution

The fourth proportional to 18,042.80, 27,064.20 and 8,179.28 is: 12,268.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,042.80 : 27,064.20 = 8,179.28 : x
  2. Step 2: Convert to fraction form
    18,042.80/27,064.20 = 8,179.28/x
  3. Step 3: Cross multiply
    18,042.80x = 27,064.20 × 8,179.28
  4. Step 4: Simplify right side
    18,042.80x = 221,365,669.78
  5. Step 5: Solve for x
    x = 221,365,669.78/18,042.80
  6. Step 6: Final answer
    x = 12,268.92

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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.