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Finding the Fourth Proportional to 27,279.78, 40,921.40 and 8,560.56

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Solution

The fourth proportional to 27,279.78, 40,921.40 and 8,560.56 is: 12,841.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,279.78 : 40,921.40 = 8,560.56 : x
  2. Step 2: Convert to fraction form
    27,279.78/40,921.40 = 8,560.56/x
  3. Step 3: Cross multiply
    27,279.78x = 40,921.40 × 8,560.56
  4. Step 4: Simplify right side
    27,279.78x = 350,310,040.43
  5. Step 5: Solve for x
    x = 350,310,040.43/27,279.78
  6. Step 6: Final answer
    x = 12,841.38

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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.