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Finding the Fourth Proportional to 8,139.05, 11,232.10 and 4,553.89

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Solution

The fourth proportional to 8,139.05, 11,232.10 and 4,553.89 is: 6,284.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.05 : 11,232.10 = 4,553.89 : x
  2. Step 2: Convert to fraction form
    8,139.05/11,232.10 = 4,553.89/x
  3. Step 3: Cross multiply
    8,139.05x = 11,232.10 × 4,553.89
  4. Step 4: Simplify right side
    8,139.05x = 51,149,747.87
  5. Step 5: Solve for x
    x = 51,149,747.87/8,139.05
  6. Step 6: Final answer
    x = 6,284.49

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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.