Home / 8,135.82-12,186.72-5,199.21

Finding the Fourth Proportional to 8,135.82, 12,186.72 and 5,199.21

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Solution

The fourth proportional to 8,135.82, 12,186.72 and 5,199.21 is: 7,787.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,135.82 : 12,186.72 = 5,199.21 : x
  2. Step 2: Convert to fraction form
    8,135.82/12,186.72 = 5,199.21/x
  3. Step 3: Cross multiply
    8,135.82x = 12,186.72 × 5,199.21
  4. Step 4: Simplify right side
    8,135.82x = 63,361,316.49
  5. Step 5: Solve for x
    x = 63,361,316.49/8,135.82
  6. Step 6: Final answer
    x = 7,787.94

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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.