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Finding the Fourth Proportional to 28,652, 39,515.88 and 19,685.12

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Solution

The fourth proportional to 28,652, 39,515.88 and 19,685.12 is: 27,149.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,652 : 39,515.88 = 19,685.12 : x
  2. Step 2: Convert to fraction form
    28,652/39,515.88 = 19,685.12/x
  3. Step 3: Cross multiply
    28,652x = 39,515.88 × 19,685.12
  4. Step 4: Simplify right side
    28,652x = 777,874,839.71
  5. Step 5: Solve for x
    x = 777,874,839.71/28,652
  6. Step 6: Final answer
    x = 27,149.06

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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.