Home / 6,115.25-8,439.09-3,320.75

Finding the Fourth Proportional to 6,115.25, 8,439.09 and 3,320.75

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Solution

The fourth proportional to 6,115.25, 8,439.09 and 3,320.75 is: 4,582.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,115.25 : 8,439.09 = 3,320.75 : x
  2. Step 2: Convert to fraction form
    6,115.25/8,439.09 = 3,320.75/x
  3. Step 3: Cross multiply
    6,115.25x = 8,439.09 × 3,320.75
  4. Step 4: Simplify right side
    6,115.25x = 28,024,108.12
  5. Step 5: Solve for x
    x = 28,024,108.12/6,115.25
  6. Step 6: Final answer
    x = 4,582.66

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Half scale
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Double scale
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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.