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Finding the Fourth Proportional to 19,191.40, 26,604.91 and 18,140.20

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Solution

The fourth proportional to 19,191.40, 26,604.91 and 18,140.20 is: 25,147.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,191.40 : 26,604.91 = 18,140.20 : x
  2. Step 2: Convert to fraction form
    19,191.40/26,604.91 = 18,140.20/x
  3. Step 3: Cross multiply
    19,191.40x = 26,604.91 × 18,140.20
  4. Step 4: Simplify right side
    19,191.40x = 482,618,388.38
  5. Step 5: Solve for x
    x = 482,618,388.38/19,191.40
  6. Step 6: Final answer
    x = 25,147.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.