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Finding the Fourth Proportional to 3,994.33, 5,509.79 and 3,108.73

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Solution

The fourth proportional to 3,994.33, 5,509.79 and 3,108.73 is: 4,288.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,994.33 : 5,509.79 = 3,108.73 : x
  2. Step 2: Convert to fraction form
    3,994.33/5,509.79 = 3,108.73/x
  3. Step 3: Cross multiply
    3,994.33x = 5,509.79 × 3,108.73
  4. Step 4: Simplify right side
    3,994.33x = 17,128,429.69
  5. Step 5: Solve for x
    x = 17,128,429.69/3,994.33
  6. Step 6: Final answer
    x = 4,288.19

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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.