Home / 13,881.07-20,803.48-12,121.90

Finding the Fourth Proportional to 13,881.07, 20,803.48 and 12,121.90

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Solution

The fourth proportional to 13,881.07, 20,803.48 and 12,121.90 is: 18,167.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,881.07 : 20,803.48 = 12,121.90 : x
  2. Step 2: Convert to fraction form
    13,881.07/20,803.48 = 12,121.90/x
  3. Step 3: Cross multiply
    13,881.07x = 20,803.48 × 12,121.90
  4. Step 4: Simplify right side
    13,881.07x = 252,177,704.21
  5. Step 5: Solve for x
    x = 252,177,704.21/13,881.07
  6. Step 6: Final answer
    x = 18,167.02

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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.