Home / 11,912.86-17,870.91-4,122.28

Finding the Fourth Proportional to 11,912.86, 17,870.91 and 4,122.28

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Solution

The fourth proportional to 11,912.86, 17,870.91 and 4,122.28 is: 6,183.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,912.86 : 17,870.91 = 4,122.28 : x
  2. Step 2: Convert to fraction form
    11,912.86/17,870.91 = 4,122.28/x
  3. Step 3: Cross multiply
    11,912.86x = 17,870.91 × 4,122.28
  4. Step 4: Simplify right side
    11,912.86x = 73,668,894.87
  5. Step 5: Solve for x
    x = 73,668,894.87/11,912.86
  6. Step 6: Final answer
    x = 6,183.98

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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.