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Finding the Fourth Proportional to 6,668.36, 9,990.12 and 4,170.32

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Solution

The fourth proportional to 6,668.36, 9,990.12 and 4,170.32 is: 6,247.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,668.36 : 9,990.12 = 4,170.32 : x
  2. Step 2: Convert to fraction form
    6,668.36/9,990.12 = 4,170.32/x
  3. Step 3: Cross multiply
    6,668.36x = 9,990.12 × 4,170.32
  4. Step 4: Simplify right side
    6,668.36x = 41,661,997.24
  5. Step 5: Solve for x
    x = 41,661,997.24/6,668.36
  6. Step 6: Final answer
    x = 6,247.71

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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.