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Finding the Fourth Proportional to 20,397, 28,147.46 and 11,444.44

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Solution

The fourth proportional to 20,397, 28,147.46 and 11,444.44 is: 15,793.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,397 : 28,147.46 = 11,444.44 : x
  2. Step 2: Convert to fraction form
    20,397/28,147.46 = 11,444.44/x
  3. Step 3: Cross multiply
    20,397x = 28,147.46 × 11,444.44
  4. Step 4: Simplify right side
    20,397x = 322,131,917.12
  5. Step 5: Solve for x
    x = 322,131,917.12/20,397
  6. Step 6: Final answer
    x = 15,793.10

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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.