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Finding the Fourth Proportional to 8,148.42, 12,218.94 and 5,520.42

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Solution

The fourth proportional to 8,148.42, 12,218.94 and 5,520.42 is: 8,278.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,148.42 : 12,218.94 = 5,520.42 : x
  2. Step 2: Convert to fraction form
    8,148.42/12,218.94 = 5,520.42/x
  3. Step 3: Cross multiply
    8,148.42x = 12,218.94 × 5,520.42
  4. Step 4: Simplify right side
    8,148.42x = 67,453,680.75
  5. Step 5: Solve for x
    x = 67,453,680.75/8,148.42
  6. Step 6: Final answer
    x = 8,278.13

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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.