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Finding the Fourth Proportional to 8,398.85, 12,599.62 and 2,851.61

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Solution

The fourth proportional to 8,398.85, 12,599.62 and 2,851.61 is: 4,277.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,398.85 : 12,599.62 = 2,851.61 : x
  2. Step 2: Convert to fraction form
    8,398.85/12,599.62 = 2,851.61/x
  3. Step 3: Cross multiply
    8,398.85x = 12,599.62 × 2,851.61
  4. Step 4: Simplify right side
    8,398.85x = 35,929,139.39
  5. Step 5: Solve for x
    x = 35,929,139.39/8,398.85
  6. Step 6: Final answer
    x = 4,277.87

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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.