Home / 12,190.91-18,286.99-3,871.58

Finding the Fourth Proportional to 12,190.91, 18,286.99 and 3,871.58

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Solution

The fourth proportional to 12,190.91, 18,286.99 and 3,871.58 is: 5,807.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.91 : 18,286.99 = 3,871.58 : x
  2. Step 2: Convert to fraction form
    12,190.91/18,286.99 = 3,871.58/x
  3. Step 3: Cross multiply
    12,190.91x = 18,286.99 × 3,871.58
  4. Step 4: Simplify right side
    12,190.91x = 70,799,443.63
  5. Step 5: Solve for x
    x = 70,799,443.63/12,190.91
  6. Step 6: Final answer
    x = 5,807.56

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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.