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Finding the Fourth Proportional to 8,855.16, 12,218.22 and 6,997.56

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Solution

The fourth proportional to 8,855.16, 12,218.22 and 6,997.56 is: 9,655.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,855.16 : 12,218.22 = 6,997.56 : x
  2. Step 2: Convert to fraction form
    8,855.16/12,218.22 = 6,997.56/x
  3. Step 3: Cross multiply
    8,855.16x = 12,218.22 × 6,997.56
  4. Step 4: Simplify right side
    8,855.16x = 85,497,727.54
  5. Step 5: Solve for x
    x = 85,497,727.54/8,855.16
  6. Step 6: Final answer
    x = 9,655.13

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Half scale
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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.