Home / 20,850.54-28,775.79-11,899.39

Finding the Fourth Proportional to 20,850.54, 28,775.79 and 11,899.39

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Solution

The fourth proportional to 20,850.54, 28,775.79 and 11,899.39 is: 16,422.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.54 : 28,775.79 = 11,899.39 : x
  2. Step 2: Convert to fraction form
    20,850.54/28,775.79 = 11,899.39/x
  3. Step 3: Cross multiply
    20,850.54x = 28,775.79 × 11,899.39
  4. Step 4: Simplify right side
    20,850.54x = 342,414,233.64
  5. Step 5: Solve for x
    x = 342,414,233.64/20,850.54
  6. Step 6: Final answer
    x = 16,422.32

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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.