Home / 84.57-126.82-30.50

Finding the Fourth Proportional to 84.57, 126.82 and 30.50

Calculator

Solution

The fourth proportional to 84.57, 126.82 and 30.50 is: 45.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.57 : 126.82 = 30.50 : x
  2. Step 2: Convert to fraction form
    84.57/126.82 = 30.50/x
  3. Step 3: Cross multiply
    84.57x = 126.82 × 30.50
  4. Step 4: Simplify right side
    84.57x = 3,868.01
  5. Step 5: Solve for x
    x = 3,868.01/84.57
  6. Step 6: Final answer
    x = 45.74

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.