Home / 21,338.28-29,447.28-11,906.64

Finding the Fourth Proportional to 21,338.28, 29,447.28 and 11,906.64

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Solution

The fourth proportional to 21,338.28, 29,447.28 and 11,906.64 is: 16,431.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,338.28 : 29,447.28 = 11,906.64 : x
  2. Step 2: Convert to fraction form
    21,338.28/29,447.28 = 11,906.64/x
  3. Step 3: Cross multiply
    21,338.28x = 29,447.28 × 11,906.64
  4. Step 4: Simplify right side
    21,338.28x = 350,618,161.94
  5. Step 5: Solve for x
    x = 350,618,161.94/21,338.28
  6. Step 6: Final answer
    x = 16,431.42

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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.