Home / 20,790.12-28,693.89-11,836.38

Finding the Fourth Proportional to 20,790.12, 28,693.89 and 11,836.38

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Solution

The fourth proportional to 20,790.12, 28,693.89 and 11,836.38 is: 16,336.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.12 : 28,693.89 = 11,836.38 : x
  2. Step 2: Convert to fraction form
    20,790.12/28,693.89 = 11,836.38/x
  3. Step 3: Cross multiply
    20,790.12x = 28,693.89 × 11,836.38
  4. Step 4: Simplify right side
    20,790.12x = 339,631,785.72
  5. Step 5: Solve for x
    x = 339,631,785.72/20,790.12
  6. Step 6: Final answer
    x = 16,336.21

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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.