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Finding the Fourth Proportional to 8,479.16, 12,721.21 and 3,798.12

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Solution

The fourth proportional to 8,479.16, 12,721.21 and 3,798.12 is: 5,698.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,479.16 : 12,721.21 = 3,798.12 : x
  2. Step 2: Convert to fraction form
    8,479.16/12,721.21 = 3,798.12/x
  3. Step 3: Cross multiply
    8,479.16x = 12,721.21 × 3,798.12
  4. Step 4: Simplify right side
    8,479.16x = 48,316,720.33
  5. Step 5: Solve for x
    x = 48,316,720.33/8,479.16
  6. Step 6: Final answer
    x = 5,698.29

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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.