Home / 18,121.67-27,147.10-12,486.05

Finding the Fourth Proportional to 18,121.67, 27,147.10 and 12,486.05

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Solution

The fourth proportional to 18,121.67, 27,147.10 and 12,486.05 is: 18,704.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,121.67 : 27,147.10 = 12,486.05 : x
  2. Step 2: Convert to fraction form
    18,121.67/27,147.10 = 12,486.05/x
  3. Step 3: Cross multiply
    18,121.67x = 27,147.10 × 12,486.05
  4. Step 4: Simplify right side
    18,121.67x = 338,960,047.96
  5. Step 5: Solve for x
    x = 338,960,047.96/18,121.67
  6. Step 6: Final answer
    x = 18,704.68

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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.