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Finding the Fourth Proportional to 20,111.40, 30,167.10 and 19,042.20

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Solution

The fourth proportional to 20,111.40, 30,167.10 and 19,042.20 is: 28,563.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111.40 : 30,167.10 = 19,042.20 : x
  2. Step 2: Convert to fraction form
    20,111.40/30,167.10 = 19,042.20/x
  3. Step 3: Cross multiply
    20,111.40x = 30,167.10 × 19,042.20
  4. Step 4: Simplify right side
    20,111.40x = 574,447,951.62
  5. Step 5: Solve for x
    x = 574,447,951.62/20,111.40
  6. Step 6: Final answer
    x = 28,563.30

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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.