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Finding the Fourth Proportional to 19,114.80, 28,640.82 and 18,385.80

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Solution

The fourth proportional to 19,114.80, 28,640.82 and 18,385.80 is: 27,548.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,114.80 : 28,640.82 = 18,385.80 : x
  2. Step 2: Convert to fraction form
    19,114.80/28,640.82 = 18,385.80/x
  3. Step 3: Cross multiply
    19,114.80x = 28,640.82 × 18,385.80
  4. Step 4: Simplify right side
    19,114.80x = 526,584,388.36
  5. Step 5: Solve for x
    x = 526,584,388.36/19,114.80
  6. Step 6: Final answer
    x = 27,548.52

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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.