Home / 13.14-19.70-6

Finding the Fourth Proportional to 13.14, 19.70 and 6

Calculator

Solution

The fourth proportional to 13.14, 19.70 and 6 is: 8.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.14 : 19.70 = 6 : x
  2. Step 2: Convert to fraction form
    13.14/19.70 = 6/x
  3. Step 3: Cross multiply
    13.14x = 19.70 × 6
  4. Step 4: Simplify right side
    13.14x = 118.17
  5. Step 5: Solve for x
    x = 118.17/13.14
  6. Step 6: Final answer
    x = 8.99

Related Problems

Find fourth proportional to 6.57, 9.85 and 3
Half scale
Find fourth proportional to 26.28, 39.39 and 12
Double scale
Find fourth proportional to 14.14, 21.19 and 7
Similar ratio
Find fourth proportional to 19.71, 29.54 and 9
1.5x scale

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.