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Finding the Fourth Proportional to 6,458.76, 9,689.12 and 2,761

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Solution

The fourth proportional to 6,458.76, 9,689.12 and 2,761 is: 4,141.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,458.76 : 9,689.12 = 2,761 : x
  2. Step 2: Convert to fraction form
    6,458.76/9,689.12 = 2,761/x
  3. Step 3: Cross multiply
    6,458.76x = 9,689.12 × 2,761
  4. Step 4: Simplify right side
    6,458.76x = 26,751,660.32
  5. Step 5: Solve for x
    x = 26,751,660.32/6,458.76
  6. Step 6: Final answer
    x = 4,141.92

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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.