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Finding the Fourth Proportional to 7,871.56, 11,807.40 and 2,028.28

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Solution

The fourth proportional to 7,871.56, 11,807.40 and 2,028.28 is: 3,042.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,871.56 : 11,807.40 = 2,028.28 : x
  2. Step 2: Convert to fraction form
    7,871.56/11,807.40 = 2,028.28/x
  3. Step 3: Cross multiply
    7,871.56x = 11,807.40 × 2,028.28
  4. Step 4: Simplify right side
    7,871.56x = 23,948,713.27
  5. Step 5: Solve for x
    x = 23,948,713.27/7,871.56
  6. Step 6: Final answer
    x = 3,042.44

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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.