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Finding the Fourth Proportional to 8,857, 12,221.59 and 5,079.97

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Solution

The fourth proportional to 8,857, 12,221.59 and 5,079.97 is: 7,009.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,857 : 12,221.59 = 5,079.97 : x
  2. Step 2: Convert to fraction form
    8,857/12,221.59 = 5,079.97/x
  3. Step 3: Cross multiply
    8,857x = 12,221.59 × 5,079.97
  4. Step 4: Simplify right side
    8,857x = 62,085,310.55
  5. Step 5: Solve for x
    x = 62,085,310.55/8,857
  6. Step 6: Final answer
    x = 7,009.74

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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.