Home / 11,921.80-17,882.70-3,157.60

Finding the Fourth Proportional to 11,921.80, 17,882.70 and 3,157.60

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Solution

The fourth proportional to 11,921.80, 17,882.70 and 3,157.60 is: 4,736.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.80 : 17,882.70 = 3,157.60 : x
  2. Step 2: Convert to fraction form
    11,921.80/17,882.70 = 3,157.60/x
  3. Step 3: Cross multiply
    11,921.80x = 17,882.70 × 3,157.60
  4. Step 4: Simplify right side
    11,921.80x = 56,466,413.52
  5. Step 5: Solve for x
    x = 56,466,413.52/11,921.80
  6. Step 6: Final answer
    x = 4,736.40

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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.