Home / 3,898.33-5,379.56-2,129.90

Finding the Fourth Proportional to 3,898.33, 5,379.56 and 2,129.90

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Solution

The fourth proportional to 3,898.33, 5,379.56 and 2,129.90 is: 2,939.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.33 : 5,379.56 = 2,129.90 : x
  2. Step 2: Convert to fraction form
    3,898.33/5,379.56 = 2,129.90/x
  3. Step 3: Cross multiply
    3,898.33x = 5,379.56 × 2,129.90
  4. Step 4: Simplify right side
    3,898.33x = 11,457,907.26
  5. Step 5: Solve for x
    x = 11,457,907.26/3,898.33
  6. Step 6: Final answer
    x = 2,939.19

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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.