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Finding the Fourth Proportional to 19,009.71, 28,512.65 and 6,696.75

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Solution

The fourth proportional to 19,009.71, 28,512.65 and 6,696.75 is: 10,044.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,009.71 : 28,512.65 = 6,696.75 : x
  2. Step 2: Convert to fraction form
    19,009.71/28,512.65 = 6,696.75/x
  3. Step 3: Cross multiply
    19,009.71x = 28,512.65 × 6,696.75
  4. Step 4: Simplify right side
    19,009.71x = 190,942,055.40
  5. Step 5: Solve for x
    x = 190,942,055.40/19,009.71
  6. Step 6: Final answer
    x = 10,044.45

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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.