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Finding the Fourth Proportional to 8,145.44, 12,218.12 and 6,921.44

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Solution

The fourth proportional to 8,145.44, 12,218.12 and 6,921.44 is: 10,382.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,145.44 : 12,218.12 = 6,921.44 : x
  2. Step 2: Convert to fraction form
    8,145.44/12,218.12 = 6,921.44/x
  3. Step 3: Cross multiply
    8,145.44x = 12,218.12 × 6,921.44
  4. Step 4: Simplify right side
    8,145.44x = 84,566,984.49
  5. Step 5: Solve for x
    x = 84,566,984.49/8,145.44
  6. Step 6: Final answer
    x = 10,382.13

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.