Home / 20,868.21-31,292.42-12,105.81

Finding the Fourth Proportional to 20,868.21, 31,292.42 and 12,105.81

Calculator

Solution

The fourth proportional to 20,868.21, 31,292.42 and 12,105.81 is: 18,152.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.21 : 31,292.42 = 12,105.81 : x
  2. Step 2: Convert to fraction form
    20,868.21/31,292.42 = 12,105.81/x
  3. Step 3: Cross multiply
    20,868.21x = 31,292.42 × 12,105.81
  4. Step 4: Simplify right side
    20,868.21x = 378,820,030.43
  5. Step 5: Solve for x
    x = 378,820,030.43/20,868.21
  6. Step 6: Final answer
    x = 18,152.97

Related Problems

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.