Home / 20,704.57-31,044.20-10,161.21

Finding the Fourth Proportional to 20,704.57, 31,044.20 and 10,161.21

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Solution

The fourth proportional to 20,704.57, 31,044.20 and 10,161.21 is: 15,235.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,704.57 : 31,044.20 = 10,161.21 : x
  2. Step 2: Convert to fraction form
    20,704.57/31,044.20 = 10,161.21/x
  3. Step 3: Cross multiply
    20,704.57x = 31,044.20 × 10,161.21
  4. Step 4: Simplify right side
    20,704.57x = 315,446,429.45
  5. Step 5: Solve for x
    x = 315,446,429.45/20,704.57
  6. Step 6: Final answer
    x = 15,235.59

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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.