Home / 20,111.42-30,162.85-6,783.21

Finding the Fourth Proportional to 20,111.42, 30,162.85 and 6,783.21

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Solution

The fourth proportional to 20,111.42, 30,162.85 and 6,783.21 is: 10,173.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111.42 : 30,162.85 = 6,783.21 : x
  2. Step 2: Convert to fraction form
    20,111.42/30,162.85 = 6,783.21/x
  3. Step 3: Cross multiply
    20,111.42x = 30,162.85 × 6,783.21
  4. Step 4: Simplify right side
    20,111.42x = 204,600,928.79
  5. Step 5: Solve for x
    x = 204,600,928.79/20,111.42
  6. Step 6: Final answer
    x = 10,173.37

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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.