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Finding the Fourth Proportional to 8,479.32, 12,721.98 and 3,798.96

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Solution

The fourth proportional to 8,479.32, 12,721.98 and 3,798.96 is: 5,699.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,479.32 : 12,721.98 = 3,798.96 : x
  2. Step 2: Convert to fraction form
    8,479.32/12,721.98 = 3,798.96/x
  3. Step 3: Cross multiply
    8,479.32x = 12,721.98 × 3,798.96
  4. Step 4: Simplify right side
    8,479.32x = 48,330,293.14
  5. Step 5: Solve for x
    x = 48,330,293.14/8,479.32
  6. Step 6: Final answer
    x = 5,699.78

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1.5x scale

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.