Home / 13,826.40-20,739.74-3,438.15

Finding the Fourth Proportional to 13,826.40, 20,739.74 and 3,438.15

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Solution

The fourth proportional to 13,826.40, 20,739.74 and 3,438.15 is: 5,157.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,826.40 : 20,739.74 = 3,438.15 : x
  2. Step 2: Convert to fraction form
    13,826.40/20,739.74 = 3,438.15/x
  3. Step 3: Cross multiply
    13,826.40x = 20,739.74 × 3,438.15
  4. Step 4: Simplify right side
    13,826.40x = 71,306,242.12
  5. Step 5: Solve for x
    x = 71,306,242.12/13,826.40
  6. Step 6: Final answer
    x = 5,157.25

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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.