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Finding the Fourth Proportional to 8,149.88, 12,219.21 and 3,220.08

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Solution

The fourth proportional to 8,149.88, 12,219.21 and 3,220.08 is: 4,827.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,149.88 : 12,219.21 = 3,220.08 : x
  2. Step 2: Convert to fraction form
    8,149.88/12,219.21 = 3,220.08/x
  3. Step 3: Cross multiply
    8,149.88x = 12,219.21 × 3,220.08
  4. Step 4: Simplify right side
    8,149.88x = 39,346,833.74
  5. Step 5: Solve for x
    x = 39,346,833.74/8,149.88
  6. Step 6: Final answer
    x = 4,827.91

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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.