Home / 3,898.17-5,379.78-2,220.09

Finding the Fourth Proportional to 3,898.17, 5,379.78 and 2,220.09

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Solution

The fourth proportional to 3,898.17, 5,379.78 and 2,220.09 is: 3,063.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.17 : 5,379.78 = 2,220.09 : x
  2. Step 2: Convert to fraction form
    3,898.17/5,379.78 = 2,220.09/x
  3. Step 3: Cross multiply
    3,898.17x = 5,379.78 × 2,220.09
  4. Step 4: Simplify right side
    3,898.17x = 11,943,595.78
  5. Step 5: Solve for x
    x = 11,943,595.78/3,898.17
  6. Step 6: Final answer
    x = 3,063.90

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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.