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Finding the Fourth Proportional to 27,892.61, 38,491.78 and 15,317.36

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Solution

The fourth proportional to 27,892.61, 38,491.78 and 15,317.36 is: 21,137.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,892.61 : 38,491.78 = 15,317.36 : x
  2. Step 2: Convert to fraction form
    27,892.61/38,491.78 = 15,317.36/x
  3. Step 3: Cross multiply
    27,892.61x = 38,491.78 × 15,317.36
  4. Step 4: Simplify right side
    27,892.61x = 589,592,451.30
  5. Step 5: Solve for x
    x = 589,592,451.30/27,892.61
  6. Step 6: Final answer
    x = 21,137.94

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.