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Finding the Fourth Proportional to 6,479.92, 8,940.20 and 3,828.24

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Solution

The fourth proportional to 6,479.92, 8,940.20 and 3,828.24 is: 5,281.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,479.92 : 8,940.20 = 3,828.24 : x
  2. Step 2: Convert to fraction form
    6,479.92/8,940.20 = 3,828.24/x
  3. Step 3: Cross multiply
    6,479.92x = 8,940.20 × 3,828.24
  4. Step 4: Simplify right side
    6,479.92x = 34,225,231.25
  5. Step 5: Solve for x
    x = 34,225,231.25/6,479.92
  6. Step 6: Final answer
    x = 5,281.74

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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.