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Finding the Fourth Proportional to 7,871.74, 11,808.30 and 2,028.34

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Solution

The fourth proportional to 7,871.74, 11,808.30 and 2,028.34 is: 3,042.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,871.74 : 11,808.30 = 2,028.34 : x
  2. Step 2: Convert to fraction form
    7,871.74/11,808.30 = 2,028.34/x
  3. Step 3: Cross multiply
    7,871.74x = 11,808.30 × 2,028.34
  4. Step 4: Simplify right side
    7,871.74x = 23,951,247.22
  5. Step 5: Solve for x
    x = 23,951,247.22/7,871.74
  6. Step 6: Final answer
    x = 3,042.69

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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.