Home / 12,172.95-18,249.87-5,147.22

Finding the Fourth Proportional to 12,172.95, 18,249.87 and 5,147.22

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Solution

The fourth proportional to 12,172.95, 18,249.87 and 5,147.22 is: 7,716.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,172.95 : 18,249.87 = 5,147.22 : x
  2. Step 2: Convert to fraction form
    12,172.95/18,249.87 = 5,147.22/x
  3. Step 3: Cross multiply
    12,172.95x = 18,249.87 × 5,147.22
  4. Step 4: Simplify right side
    12,172.95x = 93,936,095.86
  5. Step 5: Solve for x
    x = 93,936,095.86/12,172.95
  6. Step 6: Final answer
    x = 7,716.79

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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.