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Finding the Fourth Proportional to 6,617.92, 9,128.28 and 3,963.64

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Solution

The fourth proportional to 6,617.92, 9,128.28 and 3,963.64 is: 5,467.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,617.92 : 9,128.28 = 3,963.64 : x
  2. Step 2: Convert to fraction form
    6,617.92/9,128.28 = 3,963.64/x
  3. Step 3: Cross multiply
    6,617.92x = 9,128.28 × 3,963.64
  4. Step 4: Simplify right side
    6,617.92x = 36,181,215.74
  5. Step 5: Solve for x
    x = 36,181,215.74/6,617.92
  6. Step 6: Final answer
    x = 5,467.16

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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.