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Finding the Fourth Proportional to 8,939.33, 12,338.07 and 5,163.11

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Solution

The fourth proportional to 8,939.33, 12,338.07 and 5,163.11 is: 7,126.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,939.33 : 12,338.07 = 5,163.11 : x
  2. Step 2: Convert to fraction form
    8,939.33/12,338.07 = 5,163.11/x
  3. Step 3: Cross multiply
    8,939.33x = 12,338.07 × 5,163.11
  4. Step 4: Simplify right side
    8,939.33x = 63,702,750.91
  5. Step 5: Solve for x
    x = 63,702,750.91/8,939.33
  6. Step 6: Final answer
    x = 7,126.13

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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.