Home / 43,821.20-65,656.20-20,399.60

Finding the Fourth Proportional to 43,821.20, 65,656.20 and 20,399.60

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Solution

The fourth proportional to 43,821.20, 65,656.20 and 20,399.60 is: 30,564.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,821.20 : 65,656.20 = 20,399.60 : x
  2. Step 2: Convert to fraction form
    43,821.20/65,656.20 = 20,399.60/x
  3. Step 3: Cross multiply
    43,821.20x = 65,656.20 × 20,399.60
  4. Step 4: Simplify right side
    43,821.20x = 1,339,360,217.52
  5. Step 5: Solve for x
    x = 1,339,360,217.52/43,821.20
  6. Step 6: Final answer
    x = 30,564.21

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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.