Home / 13,138.20-18,130.78-7,169.99

Finding the Fourth Proportional to 13,138.20, 18,130.78 and 7,169.99

Calculator

Solution

The fourth proportional to 13,138.20, 18,130.78 and 7,169.99 is: 9,894.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.20 : 18,130.78 = 7,169.99 : x
  2. Step 2: Convert to fraction form
    13,138.20/18,130.78 = 7,169.99/x
  3. Step 3: Cross multiply
    13,138.20x = 18,130.78 × 7,169.99
  4. Step 4: Simplify right side
    13,138.20x = 129,997,556.62
  5. Step 5: Solve for x
    x = 129,997,556.62/13,138.20
  6. Step 6: Final answer
    x = 9,894.62

Related Problems

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.