Home / 3,899.35-5,381.15-2,131.00

Finding the Fourth Proportional to 3,899.35, 5,381.15 and 2,131.00

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Solution

The fourth proportional to 3,899.35, 5,381.15 and 2,131.00 is: 2,940.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.35 : 5,381.15 = 2,131.00 : x
  2. Step 2: Convert to fraction form
    3,899.35/5,381.15 = 2,131.00/x
  3. Step 3: Cross multiply
    3,899.35x = 5,381.15 × 2,131.00
  4. Step 4: Simplify right side
    3,899.35x = 11,467,193.09
  5. Step 5: Solve for x
    x = 11,467,193.09/3,899.35
  6. Step 6: Final answer
    x = 2,940.80

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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.