Home / 3,991.85-5,508.69-2,223.46

Finding the Fourth Proportional to 3,991.85, 5,508.69 and 2,223.46

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Solution

The fourth proportional to 3,991.85, 5,508.69 and 2,223.46 is: 3,068.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.85 : 5,508.69 = 2,223.46 : x
  2. Step 2: Convert to fraction form
    3,991.85/5,508.69 = 2,223.46/x
  3. Step 3: Cross multiply
    3,991.85x = 5,508.69 × 2,223.46
  4. Step 4: Simplify right side
    3,991.85x = 12,248,351.87
  5. Step 5: Solve for x
    x = 12,248,351.87/3,991.85
  6. Step 6: Final answer
    x = 3,068.34

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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.