Home / 21,219.42-29,282.04-11,787.78

Finding the Fourth Proportional to 21,219.42, 29,282.04 and 11,787.78

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Solution

The fourth proportional to 21,219.42, 29,282.04 and 11,787.78 is: 16,266.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.42 : 29,282.04 = 11,787.78 : x
  2. Step 2: Convert to fraction form
    21,219.42/29,282.04 = 11,787.78/x
  3. Step 3: Cross multiply
    21,219.42x = 29,282.04 × 11,787.78
  4. Step 4: Simplify right side
    21,219.42x = 345,170,245.47
  5. Step 5: Solve for x
    x = 345,170,245.47/21,219.42
  6. Step 6: Final answer
    x = 16,266.71

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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.