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Finding the Fourth Proportional to 18,879.85, 28,321.02 and 5,554.03

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Solution

The fourth proportional to 18,879.85, 28,321.02 and 5,554.03 is: 8,331.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879.85 : 28,321.02 = 5,554.03 : x
  2. Step 2: Convert to fraction form
    18,879.85/28,321.02 = 5,554.03/x
  3. Step 3: Cross multiply
    18,879.85x = 28,321.02 × 5,554.03
  4. Step 4: Simplify right side
    18,879.85x = 157,295,766.94
  5. Step 5: Solve for x
    x = 157,295,766.94/18,879.85
  6. Step 6: Final answer
    x = 8,331.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.