Home / 21,353.22-29,467.46-11,921.78

Finding the Fourth Proportional to 21,353.22, 29,467.46 and 11,921.78

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Solution

The fourth proportional to 21,353.22, 29,467.46 and 11,921.78 is: 16,452.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,353.22 : 29,467.46 = 11,921.78 : x
  2. Step 2: Convert to fraction form
    21,353.22/29,467.46 = 11,921.78/x
  3. Step 3: Cross multiply
    21,353.22x = 29,467.46 × 11,921.78
  4. Step 4: Simplify right side
    21,353.22x = 351,304,678.75
  5. Step 5: Solve for x
    x = 351,304,678.75/21,353.22
  6. Step 6: Final answer
    x = 16,452.07

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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.