Home / 20,800.26-28,704.78-11,369.43

Finding the Fourth Proportional to 20,800.26, 28,704.78 and 11,369.43

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Solution

The fourth proportional to 20,800.26, 28,704.78 and 11,369.43 is: 15,690.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.26 : 28,704.78 = 11,369.43 : x
  2. Step 2: Convert to fraction form
    20,800.26/28,704.78 = 11,369.43/x
  3. Step 3: Cross multiply
    20,800.26x = 28,704.78 × 11,369.43
  4. Step 4: Simplify right side
    20,800.26x = 326,356,986.88
  5. Step 5: Solve for x
    x = 326,356,986.88/20,800.26
  6. Step 6: Final answer
    x = 15,690.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.