Home / 28,327.56-39,074.79-20,380.56

Finding the Fourth Proportional to 28,327.56, 39,074.79 and 20,380.56

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Solution

The fourth proportional to 28,327.56, 39,074.79 and 20,380.56 is: 28,112.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,327.56 : 39,074.79 = 20,380.56 : x
  2. Step 2: Convert to fraction form
    28,327.56/39,074.79 = 20,380.56/x
  3. Step 3: Cross multiply
    28,327.56x = 39,074.79 × 20,380.56
  4. Step 4: Simplify right side
    28,327.56x = 796,366,102.08
  5. Step 5: Solve for x
    x = 796,366,102.08/28,327.56
  6. Step 6: Final answer
    x = 28,112.77

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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.