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Finding the Fourth Proportional to 18,854.70, 28,077.01 and 18,647.62

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Solution

The fourth proportional to 18,854.70, 28,077.01 and 18,647.62 is: 27,768.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,854.70 : 28,077.01 = 18,647.62 : x
  2. Step 2: Convert to fraction form
    18,854.70/28,077.01 = 18,647.62/x
  3. Step 3: Cross multiply
    18,854.70x = 28,077.01 × 18,647.62
  4. Step 4: Simplify right side
    18,854.70x = 523,569,413.22
  5. Step 5: Solve for x
    x = 523,569,413.22/18,854.70
  6. Step 6: Final answer
    x = 27,768.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.