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Finding the Fourth Proportional to 6,399.62, 9,588.92 and 3,929.22

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Solution

The fourth proportional to 6,399.62, 9,588.92 and 3,929.22 is: 5,887.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,399.62 : 9,588.92 = 3,929.22 : x
  2. Step 2: Convert to fraction form
    6,399.62/9,588.92 = 3,929.22/x
  3. Step 3: Cross multiply
    6,399.62x = 9,588.92 × 3,929.22
  4. Step 4: Simplify right side
    6,399.62x = 37,676,976.24
  5. Step 5: Solve for x
    x = 37,676,976.24/6,399.62
  6. Step 6: Final answer
    x = 5,887.38

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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.