Home / 31,151.23-43,035.60-20,421.61

Finding the Fourth Proportional to 31,151.23, 43,035.60 and 20,421.61

Calculator

Solution

The fourth proportional to 31,151.23, 43,035.60 and 20,421.61 is: 28,212.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,151.23 : 43,035.60 = 20,421.61 : x
  2. Step 2: Convert to fraction form
    31,151.23/43,035.60 = 20,421.61/x
  3. Step 3: Cross multiply
    31,151.23x = 43,035.60 × 20,421.61
  4. Step 4: Simplify right side
    31,151.23x = 878,856,147.79
  5. Step 5: Solve for x
    x = 878,856,147.79/31,151.23
  6. Step 6: Final answer
    x = 28,212.56

Related Problems

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.