Home / 8,105.05-12,161.22-4,989.79

Finding the Fourth Proportional to 8,105.05, 12,161.22 and 4,989.79

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Solution

The fourth proportional to 8,105.05, 12,161.22 and 4,989.79 is: 7,486.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,105.05 : 12,161.22 = 4,989.79 : x
  2. Step 2: Convert to fraction form
    8,105.05/12,161.22 = 4,989.79/x
  3. Step 3: Cross multiply
    8,105.05x = 12,161.22 × 4,989.79
  4. Step 4: Simplify right side
    8,105.05x = 60,681,933.94
  5. Step 5: Solve for x
    x = 60,681,933.94/8,105.05
  6. Step 6: Final answer
    x = 7,486.93

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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.