Home / 13,813.37-20,720.03-3,425.12

Finding the Fourth Proportional to 13,813.37, 20,720.03 and 3,425.12

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Solution

The fourth proportional to 13,813.37, 20,720.03 and 3,425.12 is: 5,137.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,813.37 : 20,720.03 = 3,425.12 : x
  2. Step 2: Convert to fraction form
    13,813.37/20,720.03 = 3,425.12/x
  3. Step 3: Cross multiply
    13,813.37x = 20,720.03 × 3,425.12
  4. Step 4: Simplify right side
    13,813.37x = 70,968,468.43
  5. Step 5: Solve for x
    x = 70,968,468.43/13,813.37
  6. Step 6: Final answer
    x = 5,137.67

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1.5x scale

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.