Home / 8,505-12,748.39-4,112.78

Finding the Fourth Proportional to 8,505, 12,748.39 and 4,112.78

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Solution

The fourth proportional to 8,505, 12,748.39 and 4,112.78 is: 6,164.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,505 : 12,748.39 = 4,112.78 : x
  2. Step 2: Convert to fraction form
    8,505/12,748.39 = 4,112.78/x
  3. Step 3: Cross multiply
    8,505x = 12,748.39 × 4,112.78
  4. Step 4: Simplify right side
    8,505x = 52,431,249.40
  5. Step 5: Solve for x
    x = 52,431,249.40/8,505
  6. Step 6: Final answer
    x = 6,164.76

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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.