Home / 12,190.43-18,286.59-3,870.92

Finding the Fourth Proportional to 12,190.43, 18,286.59 and 3,870.92

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Solution

The fourth proportional to 12,190.43, 18,286.59 and 3,870.92 is: 5,806.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.43 : 18,286.59 = 3,870.92 : x
  2. Step 2: Convert to fraction form
    12,190.43/18,286.59 = 3,870.92/x
  3. Step 3: Cross multiply
    12,190.43x = 18,286.59 × 3,870.92
  4. Step 4: Simplify right side
    12,190.43x = 70,785,987.20
  5. Step 5: Solve for x
    x = 70,785,987.20/12,190.43
  6. Step 6: Final answer
    x = 5,806.68

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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.