Home / 20,790-28,690.47-11,358.77

Finding the Fourth Proportional to 20,790, 28,690.47 and 11,358.77

Calculator

Solution

The fourth proportional to 20,790, 28,690.47 and 11,358.77 is: 15,675.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790 : 28,690.47 = 11,358.77 : x
  2. Step 2: Convert to fraction form
    20,790/28,690.47 = 11,358.77/x
  3. Step 3: Cross multiply
    20,790x = 28,690.47 × 11,358.77
  4. Step 4: Simplify right side
    20,790x = 325,888,306.47
  5. Step 5: Solve for x
    x = 325,888,306.47/20,790
  6. Step 6: Final answer
    x = 15,675.24

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.