Home / 18.86-28.19-15.45

Finding the Fourth Proportional to 18.86, 28.19 and 15.45

Calculator

Solution

The fourth proportional to 18.86, 28.19 and 15.45 is: 23.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.86 : 28.19 = 15.45 : x
  2. Step 2: Convert to fraction form
    18.86/28.19 = 15.45/x
  3. Step 3: Cross multiply
    18.86x = 28.19 × 15.45
  4. Step 4: Simplify right side
    18.86x = 435.46
  5. Step 5: Solve for x
    x = 435.46/18.86
  6. Step 6: Final answer
    x = 23.10

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.