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Finding the Fourth Proportional to 28,472.66, 39,292.29 and 15,897.41

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Solution

The fourth proportional to 28,472.66, 39,292.29 and 15,897.41 is: 21,938.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,472.66 : 39,292.29 = 15,897.41 : x
  2. Step 2: Convert to fraction form
    28,472.66/39,292.29 = 15,897.41/x
  3. Step 3: Cross multiply
    28,472.66x = 39,292.29 × 15,897.41
  4. Step 4: Simplify right side
    28,472.66x = 624,645,643.97
  5. Step 5: Solve for x
    x = 624,645,643.97/28,472.66
  6. Step 6: Final answer
    x = 21,938.44

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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.