Home / 6,115.28-8,439.12-3,320.78

Finding the Fourth Proportional to 6,115.28, 8,439.12 and 3,320.78

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Solution

The fourth proportional to 6,115.28, 8,439.12 and 3,320.78 is: 4,582.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,115.28 : 8,439.12 = 3,320.78 : x
  2. Step 2: Convert to fraction form
    6,115.28/8,439.12 = 3,320.78/x
  3. Step 3: Cross multiply
    6,115.28x = 8,439.12 × 3,320.78
  4. Step 4: Simplify right side
    6,115.28x = 28,024,460.91
  5. Step 5: Solve for x
    x = 28,024,460.91/6,115.28
  6. Step 6: Final answer
    x = 4,582.69

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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.