Home / 3,018.89-4,161.70-2,119.90

Finding the Fourth Proportional to 3,018.89, 4,161.70 and 2,119.90

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Solution

The fourth proportional to 3,018.89, 4,161.70 and 2,119.90 is: 2,922.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,018.89 : 4,161.70 = 2,119.90 : x
  2. Step 2: Convert to fraction form
    3,018.89/4,161.70 = 2,119.90/x
  3. Step 3: Cross multiply
    3,018.89x = 4,161.70 × 2,119.90
  4. Step 4: Simplify right side
    3,018.89x = 8,822,387.83
  5. Step 5: Solve for x
    x = 8,822,387.83/3,018.89
  6. Step 6: Final answer
    x = 2,922.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.