Home / 18,121.60-27,146.98-12,485.97

Finding the Fourth Proportional to 18,121.60, 27,146.98 and 12,485.97

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Solution

The fourth proportional to 18,121.60, 27,146.98 and 12,485.97 is: 18,704.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,121.60 : 27,146.98 = 12,485.97 : x
  2. Step 2: Convert to fraction form
    18,121.60/27,146.98 = 12,485.97/x
  3. Step 3: Cross multiply
    18,121.60x = 27,146.98 × 12,485.97
  4. Step 4: Simplify right side
    18,121.60x = 338,956,377.87
  5. Step 5: Solve for x
    x = 338,956,377.87/18,121.60
  6. Step 6: Final answer
    x = 18,704.55

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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.