Home / 18,690.20-27,986.70-12,080.60

Finding the Fourth Proportional to 18,690.20, 27,986.70 and 12,080.60

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Solution

The fourth proportional to 18,690.20, 27,986.70 and 12,080.60 is: 18,089.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,690.20 : 27,986.70 = 12,080.60 : x
  2. Step 2: Convert to fraction form
    18,690.20/27,986.70 = 12,080.60/x
  3. Step 3: Cross multiply
    18,690.20x = 27,986.70 × 12,080.60
  4. Step 4: Simplify right side
    18,690.20x = 338,096,128.02
  5. Step 5: Solve for x
    x = 338,096,128.02/18,690.20
  6. Step 6: Final answer
    x = 18,089.49

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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.