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Finding the Fourth Proportional to 28,062.72, 38,726.76 and 15,487.92

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Solution

The fourth proportional to 28,062.72, 38,726.76 and 15,487.92 is: 21,373.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,062.72 : 38,726.76 = 15,487.92 : x
  2. Step 2: Convert to fraction form
    28,062.72/38,726.76 = 15,487.92/x
  3. Step 3: Cross multiply
    28,062.72x = 38,726.76 × 15,487.92
  4. Step 4: Simplify right side
    28,062.72x = 599,796,960.74
  5. Step 5: Solve for x
    x = 599,796,960.74/28,062.72
  6. Step 6: Final answer
    x = 21,373.44

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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.