Home / 6,121.87-8,445.07-3,998.64

Finding the Fourth Proportional to 6,121.87, 8,445.07 and 3,998.64

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Solution

The fourth proportional to 6,121.87, 8,445.07 and 3,998.64 is: 5,516.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,121.87 : 8,445.07 = 3,998.64 : x
  2. Step 2: Convert to fraction form
    6,121.87/8,445.07 = 3,998.64/x
  3. Step 3: Cross multiply
    6,121.87x = 8,445.07 × 3,998.64
  4. Step 4: Simplify right side
    6,121.87x = 33,768,808.88
  5. Step 5: Solve for x
    x = 33,768,808.88/6,121.87
  6. Step 6: Final answer
    x = 5,516.10

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Double scale
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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.