Home / 6,621.99-9,138.60-3,638.10

Finding the Fourth Proportional to 6,621.99, 9,138.60 and 3,638.10

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Solution

The fourth proportional to 6,621.99, 9,138.60 and 3,638.10 is: 5,020.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,621.99 : 9,138.60 = 3,638.10 : x
  2. Step 2: Convert to fraction form
    6,621.99/9,138.60 = 3,638.10/x
  3. Step 3: Cross multiply
    6,621.99x = 9,138.60 × 3,638.10
  4. Step 4: Simplify right side
    6,621.99x = 33,247,140.66
  5. Step 5: Solve for x
    x = 33,247,140.66/6,621.99
  6. Step 6: Final answer
    x = 5,020.72

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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.