Home / 20,255.21-27,944.38-12,688.37

Finding the Fourth Proportional to 20,255.21, 27,944.38 and 12,688.37

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Solution

The fourth proportional to 20,255.21, 27,944.38 and 12,688.37 is: 17,505.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,255.21 : 27,944.38 = 12,688.37 : x
  2. Step 2: Convert to fraction form
    20,255.21/27,944.38 = 12,688.37/x
  3. Step 3: Cross multiply
    20,255.21x = 27,944.38 × 12,688.37
  4. Step 4: Simplify right side
    20,255.21x = 354,568,632.86
  5. Step 5: Solve for x
    x = 354,568,632.86/20,255.21
  6. Step 6: Final answer
    x = 17,505.06

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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.