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Finding the Fourth Proportional to 8,813.73, 12,162.92 and 5,455.88

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Solution

The fourth proportional to 8,813.73, 12,162.92 and 5,455.88 is: 7,529.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,813.73 : 12,162.92 = 5,455.88 : x
  2. Step 2: Convert to fraction form
    8,813.73/12,162.92 = 5,455.88/x
  3. Step 3: Cross multiply
    8,813.73x = 12,162.92 × 5,455.88
  4. Step 4: Simplify right side
    8,813.73x = 66,359,343.88
  5. Step 5: Solve for x
    x = 66,359,343.88/8,813.73
  6. Step 6: Final answer
    x = 7,529.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.