Home / 11,121.75-15,348.03-6,408.78

Finding the Fourth Proportional to 11,121.75, 15,348.03 and 6,408.78

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Solution

The fourth proportional to 11,121.75, 15,348.03 and 6,408.78 is: 8,844.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.75 : 15,348.03 = 6,408.78 : x
  2. Step 2: Convert to fraction form
    11,121.75/15,348.03 = 6,408.78/x
  3. Step 3: Cross multiply
    11,121.75x = 15,348.03 × 6,408.78
  4. Step 4: Simplify right side
    11,121.75x = 98,362,147.70
  5. Step 5: Solve for x
    x = 98,362,147.70/11,121.75
  6. Step 6: Final answer
    x = 8,844.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.