Home / 25.35-35.00-15

Finding the Fourth Proportional to 25.35, 35.00 and 15

Calculator

Solution

The fourth proportional to 25.35, 35.00 and 15 is: 20.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.35 : 35.00 = 15 : x
  2. Step 2: Convert to fraction form
    25.35/35.00 = 15/x
  3. Step 3: Cross multiply
    25.35x = 35.00 × 15
  4. Step 4: Simplify right side
    25.35x = 524.93
  5. Step 5: Solve for x
    x = 524.93/25.35
  6. Step 6: Final answer
    x = 20.71

Related Problems

Find fourth proportional to 12.68, 17.50 and 7.50
Half scale
Find fourth proportional to 50.70, 69.99 and 30
Double scale
Find fourth proportional to 26.35, 36.38 and 16
Similar ratio
Find fourth proportional to 38.03, 52.49 and 22.50
1.5x scale

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.