Home / 20.65-28.48-12.46

Finding the Fourth Proportional to 20.65, 28.48 and 12.46

Calculator

Solution

The fourth proportional to 20.65, 28.48 and 12.46 is: 17.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.65 : 28.48 = 12.46 : x
  2. Step 2: Convert to fraction form
    20.65/28.48 = 12.46/x
  3. Step 3: Cross multiply
    20.65x = 28.48 × 12.46
  4. Step 4: Simplify right side
    20.65x = 354.86
  5. Step 5: Solve for x
    x = 354.86/20.65
  6. Step 6: Final answer
    x = 17.18

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.