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Finding the Fourth Proportional to 8,479.72, 12,714.78 and 3,480.70

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Solution

The fourth proportional to 8,479.72, 12,714.78 and 3,480.70 is: 5,219.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,479.72 : 12,714.78 = 3,480.70 : x
  2. Step 2: Convert to fraction form
    8,479.72/12,714.78 = 3,480.70/x
  3. Step 3: Cross multiply
    8,479.72x = 12,714.78 × 3,480.70
  4. Step 4: Simplify right side
    8,479.72x = 44,256,334.75
  5. Step 5: Solve for x
    x = 44,256,334.75/8,479.72
  6. Step 6: Final answer
    x = 5,219.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.