Home / 11,135.88-15,368.94-6,420.20

Finding the Fourth Proportional to 11,135.88, 15,368.94 and 6,420.20

Calculator

Solution

The fourth proportional to 11,135.88, 15,368.94 and 6,420.20 is: 8,860.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,135.88 : 15,368.94 = 6,420.20 : x
  2. Step 2: Convert to fraction form
    11,135.88/15,368.94 = 6,420.20/x
  3. Step 3: Cross multiply
    11,135.88x = 15,368.94 × 6,420.20
  4. Step 4: Simplify right side
    11,135.88x = 98,671,668.59
  5. Step 5: Solve for x
    x = 98,671,668.59/11,135.88
  6. Step 6: Final answer
    x = 8,860.70

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.