Home / 9.65-13.31-6

Finding the Fourth Proportional to 9.65, 13.31 and 6

Calculator

Solution

The fourth proportional to 9.65, 13.31 and 6 is: 8.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.65 : 13.31 = 6 : x
  2. Step 2: Convert to fraction form
    9.65/13.31 = 6/x
  3. Step 3: Cross multiply
    9.65x = 13.31 × 6
  4. Step 4: Simplify right side
    9.65x = 79.83
  5. Step 5: Solve for x
    x = 79.83/9.65
  6. Step 6: Final answer
    x = 8.28

Related Problems

Find fourth proportional to 4.82, 6.65 and 3
Half scale
Find fourth proportional to 19.29, 26.61 and 12
Double scale
Find fourth proportional to 10.65, 14.68 and 7
Similar ratio
Find fourth proportional to 14.47, 19.96 and 9
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.