Home / 13,438.60-20,163.90-4,679.80

Finding the Fourth Proportional to 13,438.60, 20,163.90 and 4,679.80

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Solution

The fourth proportional to 13,438.60, 20,163.90 and 4,679.80 is: 7,021.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.60 : 20,163.90 = 4,679.80 : x
  2. Step 2: Convert to fraction form
    13,438.60/20,163.90 = 4,679.80/x
  3. Step 3: Cross multiply
    13,438.60x = 20,163.90 × 4,679.80
  4. Step 4: Simplify right side
    13,438.60x = 94,363,019.22
  5. Step 5: Solve for x
    x = 94,363,019.22/13,438.60
  6. Step 6: Final answer
    x = 7,021.79

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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.