Home / 30.60-45.99-28.11

Finding the Fourth Proportional to 30.60, 45.99 and 28.11

Calculator

Solution

The fourth proportional to 30.60, 45.99 and 28.11 is: 42.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.60 : 45.99 = 28.11 : x
  2. Step 2: Convert to fraction form
    30.60/45.99 = 28.11/x
  3. Step 3: Cross multiply
    30.60x = 45.99 × 28.11
  4. Step 4: Simplify right side
    30.60x = 1,292.78
  5. Step 5: Solve for x
    x = 1,292.78/30.60
  6. Step 6: Final answer
    x = 42.25

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.