Home / 28,629.62-39,467.34-20,105.78

Finding the Fourth Proportional to 28,629.62, 39,467.34 and 20,105.78

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Solution

The fourth proportional to 28,629.62, 39,467.34 and 20,105.78 is: 27,716.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,629.62 : 39,467.34 = 20,105.78 : x
  2. Step 2: Convert to fraction form
    28,629.62/39,467.34 = 20,105.78/x
  3. Step 3: Cross multiply
    28,629.62x = 39,467.34 × 20,105.78
  4. Step 4: Simplify right side
    28,629.62x = 793,521,655.23
  5. Step 5: Solve for x
    x = 793,521,655.23/28,629.62
  6. Step 6: Final answer
    x = 27,716.81

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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.