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Finding the Fourth Proportional to 6,439.80, 8,879.88 and 5,593.02

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Solution

The fourth proportional to 6,439.80, 8,879.88 and 5,593.02 is: 7,712.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,439.80 : 8,879.88 = 5,593.02 : x
  2. Step 2: Convert to fraction form
    6,439.80/8,879.88 = 5,593.02/x
  3. Step 3: Cross multiply
    6,439.80x = 8,879.88 × 5,593.02
  4. Step 4: Simplify right side
    6,439.80x = 49,665,346.44
  5. Step 5: Solve for x
    x = 49,665,346.44/6,439.80
  6. Step 6: Final answer
    x = 7,712.25

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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.