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Finding the Fourth Proportional to 19,078.56, 28,738.08 and 17,912.16

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Solution

The fourth proportional to 19,078.56, 28,738.08 and 17,912.16 is: 26,981.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,078.56 : 28,738.08 = 17,912.16 : x
  2. Step 2: Convert to fraction form
    19,078.56/28,738.08 = 17,912.16/x
  3. Step 3: Cross multiply
    19,078.56x = 28,738.08 × 17,912.16
  4. Step 4: Simplify right side
    19,078.56x = 514,761,087.05
  5. Step 5: Solve for x
    x = 514,761,087.05/19,078.56
  6. Step 6: Final answer
    x = 26,981.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.