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Finding the Fourth Proportional to 6,479.62, 8,939.20 and 4,088.80

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Solution

The fourth proportional to 6,479.62, 8,939.20 and 4,088.80 is: 5,640.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,479.62 : 8,939.20 = 4,088.80 : x
  2. Step 2: Convert to fraction form
    6,479.62/8,939.20 = 4,088.80/x
  3. Step 3: Cross multiply
    6,479.62x = 8,939.20 × 4,088.80
  4. Step 4: Simplify right side
    6,479.62x = 36,550,600.96
  5. Step 5: Solve for x
    x = 36,550,600.96/6,479.62
  6. Step 6: Final answer
    x = 5,640.86

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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.