Home / 20,721.22-31,108.92-12,303.09

Finding the Fourth Proportional to 20,721.22, 31,108.92 and 12,303.09

Calculator

Solution

The fourth proportional to 20,721.22, 31,108.92 and 12,303.09 is: 18,470.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.22 : 31,108.92 = 12,303.09 : x
  2. Step 2: Convert to fraction form
    20,721.22/31,108.92 = 12,303.09/x
  3. Step 3: Cross multiply
    20,721.22x = 31,108.92 × 12,303.09
  4. Step 4: Simplify right side
    20,721.22x = 382,735,687.02
  5. Step 5: Solve for x
    x = 382,735,687.02/20,721.22
  6. Step 6: Final answer
    x = 18,470.72

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.