Home / 13,821.16-20,728.66-3,961.20

Finding the Fourth Proportional to 13,821.16, 20,728.66 and 3,961.20

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Solution

The fourth proportional to 13,821.16, 20,728.66 and 3,961.20 is: 5,940.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,821.16 : 20,728.66 = 3,961.20 : x
  2. Step 2: Convert to fraction form
    13,821.16/20,728.66 = 3,961.20/x
  3. Step 3: Cross multiply
    13,821.16x = 20,728.66 × 3,961.20
  4. Step 4: Simplify right side
    13,821.16x = 82,110,443.25
  5. Step 5: Solve for x
    x = 82,110,443.25/13,821.16
  6. Step 6: Final answer
    x = 5,940.92

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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.