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Finding the Fourth Proportional to 6,261.60, 8,640.24 and 3,608.88

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Solution

The fourth proportional to 6,261.60, 8,640.24 and 3,608.88 is: 4,979.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,261.60 : 8,640.24 = 3,608.88 : x
  2. Step 2: Convert to fraction form
    6,261.60/8,640.24 = 3,608.88/x
  3. Step 3: Cross multiply
    6,261.60x = 8,640.24 × 3,608.88
  4. Step 4: Simplify right side
    6,261.60x = 31,181,589.33
  5. Step 5: Solve for x
    x = 31,181,589.33/6,261.60
  6. Step 6: Final answer
    x = 4,979.81

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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.