Home / 11,912.64-17,868.80-4,121.34

Finding the Fourth Proportional to 11,912.64, 17,868.80 and 4,121.34

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Solution

The fourth proportional to 11,912.64, 17,868.80 and 4,121.34 is: 6,181.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,912.64 : 17,868.80 = 4,121.34 : x
  2. Step 2: Convert to fraction form
    11,912.64/17,868.80 = 4,121.34/x
  3. Step 3: Cross multiply
    11,912.64x = 17,868.80 × 4,121.34
  4. Step 4: Simplify right side
    11,912.64x = 73,643,400.19
  5. Step 5: Solve for x
    x = 73,643,400.19/11,912.64
  6. Step 6: Final answer
    x = 6,181.95

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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.