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Finding the Fourth Proportional to 8,639.66, 12,959.48 and 2,716.52

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Solution

The fourth proportional to 8,639.66, 12,959.48 and 2,716.52 is: 4,074.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.66 : 12,959.48 = 2,716.52 : x
  2. Step 2: Convert to fraction form
    8,639.66/12,959.48 = 2,716.52/x
  3. Step 3: Cross multiply
    8,639.66x = 12,959.48 × 2,716.52
  4. Step 4: Simplify right side
    8,639.66x = 35,204,613.32
  5. Step 5: Solve for x
    x = 35,204,613.32/8,639.66
  6. Step 6: Final answer
    x = 4,074.77

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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.