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Finding the Fourth Proportional to 8,571.78, 12,857.58 and 2,728.89

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Solution

The fourth proportional to 8,571.78, 12,857.58 and 2,728.89 is: 4,093.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,571.78 : 12,857.58 = 2,728.89 : x
  2. Step 2: Convert to fraction form
    8,571.78/12,857.58 = 2,728.89/x
  3. Step 3: Cross multiply
    8,571.78x = 12,857.58 × 2,728.89
  4. Step 4: Simplify right side
    8,571.78x = 35,086,921.49
  5. Step 5: Solve for x
    x = 35,086,921.49/8,571.78
  6. Step 6: Final answer
    x = 4,093.31

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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.