Home / 13,650.28-20,480.26-7,811.80

Finding the Fourth Proportional to 13,650.28, 20,480.26 and 7,811.80

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Solution

The fourth proportional to 13,650.28, 20,480.26 and 7,811.80 is: 11,720.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,650.28 : 20,480.26 = 7,811.80 : x
  2. Step 2: Convert to fraction form
    13,650.28/20,480.26 = 7,811.80/x
  3. Step 3: Cross multiply
    13,650.28x = 20,480.26 × 7,811.80
  4. Step 4: Simplify right side
    13,650.28x = 159,987,695.07
  5. Step 5: Solve for x
    x = 159,987,695.07/13,650.28
  6. Step 6: Final answer
    x = 11,720.47

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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.