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Finding the Fourth Proportional to 28,164.78, 38,821.95 and 19,087.11

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Solution

The fourth proportional to 28,164.78, 38,821.95 and 19,087.11 is: 26,309.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,164.78 : 38,821.95 = 19,087.11 : x
  2. Step 2: Convert to fraction form
    28,164.78/38,821.95 = 19,087.11/x
  3. Step 3: Cross multiply
    28,164.78x = 38,821.95 × 19,087.11
  4. Step 4: Simplify right side
    28,164.78x = 740,998,830.06
  5. Step 5: Solve for x
    x = 740,998,830.06/28,164.78
  6. Step 6: Final answer
    x = 26,309.41

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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.