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Finding the Fourth Proportional to 8,358.62, 12,538.58 and 2,811.92

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Solution

The fourth proportional to 8,358.62, 12,538.58 and 2,811.92 is: 4,218.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,358.62 : 12,538.58 = 2,811.92 : x
  2. Step 2: Convert to fraction form
    8,358.62/12,538.58 = 2,811.92/x
  3. Step 3: Cross multiply
    8,358.62x = 12,538.58 × 2,811.92
  4. Step 4: Simplify right side
    8,358.62x = 35,257,407.12
  5. Step 5: Solve for x
    x = 35,257,407.12/8,358.62
  6. Step 6: Final answer
    x = 4,218.09

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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.