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Finding the Fourth Proportional to 8,458.76, 12,689.34 and 2,615.82

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Solution

The fourth proportional to 8,458.76, 12,689.34 and 2,615.82 is: 3,924.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,458.76 : 12,689.34 = 2,615.82 : x
  2. Step 2: Convert to fraction form
    8,458.76/12,689.34 = 2,615.82/x
  3. Step 3: Cross multiply
    8,458.76x = 12,689.34 × 2,615.82
  4. Step 4: Simplify right side
    8,458.76x = 33,193,029.36
  5. Step 5: Solve for x
    x = 33,193,029.36/8,458.76
  6. Step 6: Final answer
    x = 3,924.10

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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.