Home / 20,379.15-30,535.92-12,571.56

Finding the Fourth Proportional to 20,379.15, 30,535.92 and 12,571.56

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Solution

The fourth proportional to 20,379.15, 30,535.92 and 12,571.56 is: 18,837.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.15 : 30,535.92 = 12,571.56 : x
  2. Step 2: Convert to fraction form
    20,379.15/30,535.92 = 12,571.56/x
  3. Step 3: Cross multiply
    20,379.15x = 30,535.92 × 12,571.56
  4. Step 4: Simplify right side
    20,379.15x = 383,884,150.44
  5. Step 5: Solve for x
    x = 383,884,150.44/20,379.15
  6. Step 6: Final answer
    x = 18,837.10

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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.