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Finding the Fourth Proportional to 18,311.91, 27,458.14 and 12,470.19

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Solution

The fourth proportional to 18,311.91, 27,458.14 and 12,470.19 is: 18,698.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,311.91 : 27,458.14 = 12,470.19 : x
  2. Step 2: Convert to fraction form
    18,311.91/27,458.14 = 12,470.19/x
  3. Step 3: Cross multiply
    18,311.91x = 27,458.14 × 12,470.19
  4. Step 4: Simplify right side
    18,311.91x = 342,408,222.85
  5. Step 5: Solve for x
    x = 342,408,222.85/18,311.91
  6. Step 6: Final answer
    x = 18,698.66

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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.