Home / 8,119.81-12,177.57-3,189.49

Finding the Fourth Proportional to 8,119.81, 12,177.57 and 3,189.49

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Solution

The fourth proportional to 8,119.81, 12,177.57 and 3,189.49 is: 4,783.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,119.81 : 12,177.57 = 3,189.49 : x
  2. Step 2: Convert to fraction form
    8,119.81/12,177.57 = 3,189.49/x
  3. Step 3: Cross multiply
    8,119.81x = 12,177.57 × 3,189.49
  4. Step 4: Simplify right side
    8,119.81x = 38,840,260.84
  5. Step 5: Solve for x
    x = 38,840,260.84/8,119.81
  6. Step 6: Final answer
    x = 4,783.39

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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.