Home / 28,112.94-42,189.12-20,736.54

Finding the Fourth Proportional to 28,112.94, 42,189.12 and 20,736.54

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Solution

The fourth proportional to 28,112.94, 42,189.12 and 20,736.54 is: 31,119.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,112.94 : 42,189.12 = 20,736.54 : x
  2. Step 2: Convert to fraction form
    28,112.94/42,189.12 = 20,736.54/x
  3. Step 3: Cross multiply
    28,112.94x = 42,189.12 × 20,736.54
  4. Step 4: Simplify right side
    28,112.94x = 874,856,374.44
  5. Step 5: Solve for x
    x = 874,856,374.44/28,112.94
  6. Step 6: Final answer
    x = 31,119.35

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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.