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Finding the Fourth Proportional to 18,040.80, 27,042.96 and 6,938.88

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Solution

The fourth proportional to 18,040.80, 27,042.96 and 6,938.88 is: 10,401.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,040.80 : 27,042.96 = 6,938.88 : x
  2. Step 2: Convert to fraction form
    18,040.80/27,042.96 = 6,938.88/x
  3. Step 3: Cross multiply
    18,040.80x = 27,042.96 × 6,938.88
  4. Step 4: Simplify right side
    18,040.80x = 187,647,854.28
  5. Step 5: Solve for x
    x = 187,647,854.28/18,040.80
  6. Step 6: Final answer
    x = 10,401.30

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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.