Home / 3,638.22-5,458.69-2,178.39

Finding the Fourth Proportional to 3,638.22, 5,458.69 and 2,178.39

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Solution

The fourth proportional to 3,638.22, 5,458.69 and 2,178.39 is: 3,268.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,638.22 : 5,458.69 = 2,178.39 : x
  2. Step 2: Convert to fraction form
    3,638.22/5,458.69 = 2,178.39/x
  3. Step 3: Cross multiply
    3,638.22x = 5,458.69 × 2,178.39
  4. Step 4: Simplify right side
    3,638.22x = 11,891,178.90
  5. Step 5: Solve for x
    x = 11,891,178.90/3,638.22
  6. Step 6: Final answer
    x = 3,268.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.