Home / 13,672.08-20,505.74-3,811.40

Finding the Fourth Proportional to 13,672.08, 20,505.74 and 3,811.40

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Solution

The fourth proportional to 13,672.08, 20,505.74 and 3,811.40 is: 5,716.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,672.08 : 20,505.74 = 3,811.40 : x
  2. Step 2: Convert to fraction form
    13,672.08/20,505.74 = 3,811.40/x
  3. Step 3: Cross multiply
    13,672.08x = 20,505.74 × 3,811.40
  4. Step 4: Simplify right side
    13,672.08x = 78,155,577.44
  5. Step 5: Solve for x
    x = 78,155,577.44/13,672.08
  6. Step 6: Final answer
    x = 5,716.44

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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.