Home / 13.10-19.65-5.09

Finding the Fourth Proportional to 13.10, 19.65 and 5.09

Calculator

Solution

The fourth proportional to 13.10, 19.65 and 5.09 is: 7.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.10 : 19.65 = 5.09 : x
  2. Step 2: Convert to fraction form
    13.10/19.65 = 5.09/x
  3. Step 3: Cross multiply
    13.10x = 19.65 × 5.09
  4. Step 4: Simplify right side
    13.10x = 100.02
  5. Step 5: Solve for x
    x = 100.02/13.10
  6. Step 6: Final answer
    x = 7.64

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.