Home / 21,745.75-29,784.27-20,469.09

Finding the Fourth Proportional to 21,745.75, 29,784.27 and 20,469.09

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Solution

The fourth proportional to 21,745.75, 29,784.27 and 20,469.09 is: 28,035.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,745.75 : 29,784.27 = 20,469.09 : x
  2. Step 2: Convert to fraction form
    21,745.75/29,784.27 = 20,469.09/x
  3. Step 3: Cross multiply
    21,745.75x = 29,784.27 × 20,469.09
  4. Step 4: Simplify right side
    21,745.75x = 609,656,903.21
  5. Step 5: Solve for x
    x = 609,656,903.21/21,745.75
  6. Step 6: Final answer
    x = 28,035.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.