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Finding the Fourth Proportional to 28,248.96, 38,998.08 and 19,902.72

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Solution

The fourth proportional to 28,248.96, 38,998.08 and 19,902.72 is: 27,475.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,248.96 : 38,998.08 = 19,902.72 : x
  2. Step 2: Convert to fraction form
    28,248.96/38,998.08 = 19,902.72/x
  3. Step 3: Cross multiply
    28,248.96x = 38,998.08 × 19,902.72
  4. Step 4: Simplify right side
    28,248.96x = 776,167,866.78
  5. Step 5: Solve for x
    x = 776,167,866.78/28,248.96
  6. Step 6: Final answer
    x = 27,475.98

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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.