Home / 18,760.98-28,121.22-12,191.88

Finding the Fourth Proportional to 18,760.98, 28,121.22 and 12,191.88

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Solution

The fourth proportional to 18,760.98, 28,121.22 and 12,191.88 is: 18,274.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,760.98 : 28,121.22 = 12,191.88 : x
  2. Step 2: Convert to fraction form
    18,760.98/28,121.22 = 12,191.88/x
  3. Step 3: Cross multiply
    18,760.98x = 28,121.22 × 12,191.88
  4. Step 4: Simplify right side
    18,760.98x = 342,850,539.69
  5. Step 5: Solve for x
    x = 342,850,539.69/18,760.98
  6. Step 6: Final answer
    x = 18,274.66

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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.