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Finding the Fourth Proportional to 20,854.49, 28,773.47 and 11,898.77

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Solution

The fourth proportional to 20,854.49, 28,773.47 and 11,898.77 is: 16,417.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.49 : 28,773.47 = 11,898.77 : x
  2. Step 2: Convert to fraction form
    20,854.49/28,773.47 = 11,898.77/x
  3. Step 3: Cross multiply
    20,854.49x = 28,773.47 × 11,898.77
  4. Step 4: Simplify right side
    20,854.49x = 342,368,842.14
  5. Step 5: Solve for x
    x = 342,368,842.14/20,854.49
  6. Step 6: Final answer
    x = 16,417.03

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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.