Home / 3,939.12-5,429.16-2,994.48

Finding the Fourth Proportional to 3,939.12, 5,429.16 and 2,994.48

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Solution

The fourth proportional to 3,939.12, 5,429.16 and 2,994.48 is: 4,127.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.12 : 5,429.16 = 2,994.48 : x
  2. Step 2: Convert to fraction form
    3,939.12/5,429.16 = 2,994.48/x
  3. Step 3: Cross multiply
    3,939.12x = 5,429.16 × 2,994.48
  4. Step 4: Simplify right side
    3,939.12x = 16,257,511.04
  5. Step 5: Solve for x
    x = 16,257,511.04/3,939.12
  6. Step 6: Final answer
    x = 4,127.19

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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.