Home / 8,112.20-12,161.10-5,340.20

Finding the Fourth Proportional to 8,112.20, 12,161.10 and 5,340.20

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Solution

The fourth proportional to 8,112.20, 12,161.10 and 5,340.20 is: 8,005.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,112.20 : 12,161.10 = 5,340.20 : x
  2. Step 2: Convert to fraction form
    8,112.20/12,161.10 = 5,340.20/x
  3. Step 3: Cross multiply
    8,112.20x = 12,161.10 × 5,340.20
  4. Step 4: Simplify right side
    8,112.20x = 64,942,706.22
  5. Step 5: Solve for x
    x = 64,942,706.22/8,112.20
  6. Step 6: Final answer
    x = 8,005.56

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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.