Home / 12,821.12-19,231.68-3,586.88

Finding the Fourth Proportional to 12,821.12, 19,231.68 and 3,586.88

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Solution

The fourth proportional to 12,821.12, 19,231.68 and 3,586.88 is: 5,380.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,821.12 : 19,231.68 = 3,586.88 : x
  2. Step 2: Convert to fraction form
    12,821.12/19,231.68 = 3,586.88/x
  3. Step 3: Cross multiply
    12,821.12x = 19,231.68 × 3,586.88
  4. Step 4: Simplify right side
    12,821.12x = 68,981,728.36
  5. Step 5: Solve for x
    x = 68,981,728.36/12,821.12
  6. Step 6: Final answer
    x = 5,380.32

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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.