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Finding the Fourth Proportional to 28,076.08, 38,745.28 and 15,500.80

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Solution

The fourth proportional to 28,076.08, 38,745.28 and 15,500.80 is: 21,391.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,076.08 : 38,745.28 = 15,500.80 : x
  2. Step 2: Convert to fraction form
    28,076.08/38,745.28 = 15,500.80/x
  3. Step 3: Cross multiply
    28,076.08x = 38,745.28 × 15,500.80
  4. Step 4: Simplify right side
    28,076.08x = 600,582,836.22
  5. Step 5: Solve for x
    x = 600,582,836.22/28,076.08
  6. Step 6: Final answer
    x = 21,391.26

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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.