Home / 13,826.46-20,739.69-3,438.21

Finding the Fourth Proportional to 13,826.46, 20,739.69 and 3,438.21

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Solution

The fourth proportional to 13,826.46, 20,739.69 and 3,438.21 is: 5,157.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,826.46 : 20,739.69 = 3,438.21 : x
  2. Step 2: Convert to fraction form
    13,826.46/20,739.69 = 3,438.21/x
  3. Step 3: Cross multiply
    13,826.46x = 20,739.69 × 3,438.21
  4. Step 4: Simplify right side
    13,826.46x = 71,307,487.33
  5. Step 5: Solve for x
    x = 71,307,487.33/13,826.46
  6. Step 6: Final answer
    x = 5,157.32

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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.