Home / 12,115.97-18,176.68-4,218.85

Finding the Fourth Proportional to 12,115.97, 18,176.68 and 4,218.85

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Solution

The fourth proportional to 12,115.97, 18,176.68 and 4,218.85 is: 6,329.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,115.97 : 18,176.68 = 4,218.85 : x
  2. Step 2: Convert to fraction form
    12,115.97/18,176.68 = 4,218.85/x
  3. Step 3: Cross multiply
    12,115.97x = 18,176.68 × 4,218.85
  4. Step 4: Simplify right side
    12,115.97x = 76,684,595.53
  5. Step 5: Solve for x
    x = 76,684,595.53/12,115.97
  6. Step 6: Final answer
    x = 6,329.22

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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.