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Finding the Fourth Proportional to 8,262.52, 12,389.66 and 2,639.44

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Solution

The fourth proportional to 8,262.52, 12,389.66 and 2,639.44 is: 3,957.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,262.52 : 12,389.66 = 2,639.44 : x
  2. Step 2: Convert to fraction form
    8,262.52/12,389.66 = 2,639.44/x
  3. Step 3: Cross multiply
    8,262.52x = 12,389.66 × 2,639.44
  4. Step 4: Simplify right side
    8,262.52x = 32,701,764.19
  5. Step 5: Solve for x
    x = 32,701,764.19/8,262.52
  6. Step 6: Final answer
    x = 3,957.84

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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.