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Finding the Fourth Proportional to 8,479.31, 11,702.81 and 8,105.58

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Solution

The fourth proportional to 8,479.31, 11,702.81 and 8,105.58 is: 11,187.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,479.31 : 11,702.81 = 8,105.58 : x
  2. Step 2: Convert to fraction form
    8,479.31/11,702.81 = 8,105.58/x
  3. Step 3: Cross multiply
    8,479.31x = 11,702.81 × 8,105.58
  4. Step 4: Simplify right side
    8,479.31x = 94,858,082.94
  5. Step 5: Solve for x
    x = 94,858,082.94/8,479.31
  6. Step 6: Final answer
    x = 11,187.01

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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.