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Finding the Fourth Proportional to 8,613.36, 12,917.16 and 2,768.58

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Solution

The fourth proportional to 8,613.36, 12,917.16 and 2,768.58 is: 4,151.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613.36 : 12,917.16 = 2,768.58 : x
  2. Step 2: Convert to fraction form
    8,613.36/12,917.16 = 2,768.58/x
  3. Step 3: Cross multiply
    8,613.36x = 12,917.16 × 2,768.58
  4. Step 4: Simplify right side
    8,613.36x = 35,762,190.83
  5. Step 5: Solve for x
    x = 35,762,190.83/8,613.36
  6. Step 6: Final answer
    x = 4,151.94

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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.