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Finding the Fourth Proportional to 7,886.54, 11,828.26 and 2,620.72

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Solution

The fourth proportional to 7,886.54, 11,828.26 and 2,620.72 is: 3,930.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,886.54 : 11,828.26 = 2,620.72 : x
  2. Step 2: Convert to fraction form
    7,886.54/11,828.26 = 2,620.72/x
  3. Step 3: Cross multiply
    7,886.54x = 11,828.26 × 2,620.72
  4. Step 4: Simplify right side
    7,886.54x = 30,998,557.55
  5. Step 5: Solve for x
    x = 30,998,557.55/7,886.54
  6. Step 6: Final answer
    x = 3,930.56

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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.