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Finding the Fourth Proportional to 12,823.92, 17,702.46 and 8,634.60

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Solution

The fourth proportional to 12,823.92, 17,702.46 and 8,634.60 is: 11,919.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,823.92 : 17,702.46 = 8,634.60 : x
  2. Step 2: Convert to fraction form
    12,823.92/17,702.46 = 8,634.60/x
  3. Step 3: Cross multiply
    12,823.92x = 17,702.46 × 8,634.60
  4. Step 4: Simplify right side
    12,823.92x = 152,853,661.12
  5. Step 5: Solve for x
    x = 152,853,661.12/12,823.92
  6. Step 6: Final answer
    x = 11,919.42

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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.