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Finding the Fourth Proportional to 8,281.92, 11,429.12 and 4,505.12

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Solution

The fourth proportional to 8,281.92, 11,429.12 and 4,505.12 is: 6,217.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,281.92 : 11,429.12 = 4,505.12 : x
  2. Step 2: Convert to fraction form
    8,281.92/11,429.12 = 4,505.12/x
  3. Step 3: Cross multiply
    8,281.92x = 11,429.12 × 4,505.12
  4. Step 4: Simplify right side
    8,281.92x = 51,489,557.09
  5. Step 5: Solve for x
    x = 51,489,557.09/8,281.92
  6. Step 6: Final answer
    x = 6,217.10

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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.