Home / 8,115.66-12,172.41-5,163.21

Finding the Fourth Proportional to 8,115.66, 12,172.41 and 5,163.21

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Solution

The fourth proportional to 8,115.66, 12,172.41 and 5,163.21 is: 7,744.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.66 : 12,172.41 = 5,163.21 : x
  2. Step 2: Convert to fraction form
    8,115.66/12,172.41 = 5,163.21/x
  3. Step 3: Cross multiply
    8,115.66x = 12,172.41 × 5,163.21
  4. Step 4: Simplify right side
    8,115.66x = 62,848,709.04
  5. Step 5: Solve for x
    x = 62,848,709.04/8,115.66
  6. Step 6: Final answer
    x = 7,744.13

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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.