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Finding the Fourth Proportional to 28,431.60, 39,245.40 and 17,107.44

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Solution

The fourth proportional to 28,431.60, 39,245.40 and 17,107.44 is: 23,614.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.60 : 39,245.40 = 17,107.44 : x
  2. Step 2: Convert to fraction form
    28,431.60/39,245.40 = 17,107.44/x
  3. Step 3: Cross multiply
    28,431.60x = 39,245.40 × 17,107.44
  4. Step 4: Simplify right side
    28,431.60x = 671,388,325.78
  5. Step 5: Solve for x
    x = 671,388,325.78/28,431.60
  6. Step 6: Final answer
    x = 23,614.16

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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.