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Finding the Fourth Proportional to 19,201.78, 28,806.60 and 10,885.51

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Solution

The fourth proportional to 19,201.78, 28,806.60 and 10,885.51 is: 16,330.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,201.78 : 28,806.60 = 10,885.51 : x
  2. Step 2: Convert to fraction form
    19,201.78/28,806.60 = 10,885.51/x
  3. Step 3: Cross multiply
    19,201.78x = 28,806.60 × 10,885.51
  4. Step 4: Simplify right side
    19,201.78x = 313,574,532.37
  5. Step 5: Solve for x
    x = 313,574,532.37/19,201.78
  6. Step 6: Final answer
    x = 16,330.49

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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.