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Finding the Fourth Proportional to 20,448.54, 28,215.96 and 11,495.58

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Solution

The fourth proportional to 20,448.54, 28,215.96 and 11,495.58 is: 15,862.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,448.54 : 28,215.96 = 11,495.58 : x
  2. Step 2: Convert to fraction form
    20,448.54/28,215.96 = 11,495.58/x
  3. Step 3: Cross multiply
    20,448.54x = 28,215.96 × 11,495.58
  4. Step 4: Simplify right side
    20,448.54x = 324,358,825.46
  5. Step 5: Solve for x
    x = 324,358,825.46/20,448.54
  6. Step 6: Final answer
    x = 15,862.20

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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.