Home / 3,991.59-5,508.71-2,223.75

Finding the Fourth Proportional to 3,991.59, 5,508.71 and 2,223.75

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Solution

The fourth proportional to 3,991.59, 5,508.71 and 2,223.75 is: 3,068.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.59 : 5,508.71 = 2,223.75 : x
  2. Step 2: Convert to fraction form
    3,991.59/5,508.71 = 2,223.75/x
  3. Step 3: Cross multiply
    3,991.59x = 5,508.71 × 2,223.75
  4. Step 4: Simplify right side
    3,991.59x = 12,249,982.74
  5. Step 5: Solve for x
    x = 12,249,982.74/3,991.59
  6. Step 6: Final answer
    x = 3,068.95

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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.