Home / 28,511.94-42,778.87-20,086.55

Finding the Fourth Proportional to 28,511.94, 42,778.87 and 20,086.55

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Solution

The fourth proportional to 28,511.94, 42,778.87 and 20,086.55 is: 30,137.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,511.94 : 42,778.87 = 20,086.55 : x
  2. Step 2: Convert to fraction form
    28,511.94/42,778.87 = 20,086.55/x
  3. Step 3: Cross multiply
    28,511.94x = 42,778.87 × 20,086.55
  4. Step 4: Simplify right side
    28,511.94x = 859,279,647.09
  5. Step 5: Solve for x
    x = 859,279,647.09/28,511.94
  6. Step 6: Final answer
    x = 30,137.54

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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.