Home / 6,621.88-9,138.36-3,638

Finding the Fourth Proportional to 6,621.88, 9,138.36 and 3,638

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Solution

The fourth proportional to 6,621.88, 9,138.36 and 3,638 is: 5,020.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,621.88 : 9,138.36 = 3,638 : x
  2. Step 2: Convert to fraction form
    6,621.88/9,138.36 = 3,638/x
  3. Step 3: Cross multiply
    6,621.88x = 9,138.36 × 3,638
  4. Step 4: Simplify right side
    6,621.88x = 33,245,353.68
  5. Step 5: Solve for x
    x = 33,245,353.68/6,621.88
  6. Step 6: Final answer
    x = 5,020.53

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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.