Home / 3,939.49-5,435.80-2,894.05

Finding the Fourth Proportional to 3,939.49, 5,435.80 and 2,894.05

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Solution

The fourth proportional to 3,939.49, 5,435.80 and 2,894.05 is: 3,993.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.49 : 5,435.80 = 2,894.05 : x
  2. Step 2: Convert to fraction form
    3,939.49/5,435.80 = 2,894.05/x
  3. Step 3: Cross multiply
    3,939.49x = 5,435.80 × 2,894.05
  4. Step 4: Simplify right side
    3,939.49x = 15,731,476.99
  5. Step 5: Solve for x
    x = 15,731,476.99/3,939.49
  6. Step 6: Final answer
    x = 3,993.28

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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.