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Finding the Fourth Proportional to 8,412.25, 12,608.81 and 5,118.08

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Solution

The fourth proportional to 8,412.25, 12,608.81 and 5,118.08 is: 7,671.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,412.25 : 12,608.81 = 5,118.08 : x
  2. Step 2: Convert to fraction form
    8,412.25/12,608.81 = 5,118.08/x
  3. Step 3: Cross multiply
    8,412.25x = 12,608.81 × 5,118.08
  4. Step 4: Simplify right side
    8,412.25x = 64,532,872.69
  5. Step 5: Solve for x
    x = 64,532,872.69/8,412.25
  6. Step 6: Final answer
    x = 7,671.30

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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.