Home / 20,813.72-31,212.50-16,380.09

Finding the Fourth Proportional to 20,813.72, 31,212.50 and 16,380.09

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Solution

The fourth proportional to 20,813.72, 31,212.50 and 16,380.09 is: 24,563.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.72 : 31,212.50 = 16,380.09 : x
  2. Step 2: Convert to fraction form
    20,813.72/31,212.50 = 16,380.09/x
  3. Step 3: Cross multiply
    20,813.72x = 31,212.50 × 16,380.09
  4. Step 4: Simplify right side
    20,813.72x = 511,263,477.22
  5. Step 5: Solve for x
    x = 511,263,477.22/20,813.72
  6. Step 6: Final answer
    x = 24,563.78

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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.