Home / 3,991.51-5,508.21-2,223.15

Finding the Fourth Proportional to 3,991.51, 5,508.21 and 2,223.15

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Solution

The fourth proportional to 3,991.51, 5,508.21 and 2,223.15 is: 3,067.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.51 : 5,508.21 = 2,223.15 : x
  2. Step 2: Convert to fraction form
    3,991.51/5,508.21 = 2,223.15/x
  3. Step 3: Cross multiply
    3,991.51x = 5,508.21 × 2,223.15
  4. Step 4: Simplify right side
    3,991.51x = 12,245,577.06
  5. Step 5: Solve for x
    x = 12,245,577.06/3,991.51
  6. Step 6: Final answer
    x = 3,067.91

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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.