Home / 12,018.70-18,028.33-4,121.15

Finding the Fourth Proportional to 12,018.70, 18,028.33 and 4,121.15

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Solution

The fourth proportional to 12,018.70, 18,028.33 and 4,121.15 is: 6,181.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,018.70 : 18,028.33 = 4,121.15 : x
  2. Step 2: Convert to fraction form
    12,018.70/18,028.33 = 4,121.15/x
  3. Step 3: Cross multiply
    12,018.70x = 18,028.33 × 4,121.15
  4. Step 4: Simplify right side
    12,018.70x = 74,297,452.18
  5. Step 5: Solve for x
    x = 74,297,452.18/12,018.70
  6. Step 6: Final answer
    x = 6,181.82

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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.