Home / 20,379.94-28,125.02-11,427.55

Finding the Fourth Proportional to 20,379.94, 28,125.02 and 11,427.55

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Solution

The fourth proportional to 20,379.94, 28,125.02 and 11,427.55 is: 15,770.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.94 : 28,125.02 = 11,427.55 : x
  2. Step 2: Convert to fraction form
    20,379.94/28,125.02 = 11,427.55/x
  3. Step 3: Cross multiply
    20,379.94x = 28,125.02 × 11,427.55
  4. Step 4: Simplify right side
    20,379.94x = 321,399,874.54
  5. Step 5: Solve for x
    x = 321,399,874.54/20,379.94
  6. Step 6: Final answer
    x = 15,770.41

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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.