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Finding the Fourth Proportional to 15,393.44, 21,245.28 and 9,107.84

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Solution

The fourth proportional to 15,393.44, 21,245.28 and 9,107.84 is: 12,570.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,393.44 : 21,245.28 = 9,107.84 : x
  2. Step 2: Convert to fraction form
    15,393.44/21,245.28 = 9,107.84/x
  3. Step 3: Cross multiply
    15,393.44x = 21,245.28 × 9,107.84
  4. Step 4: Simplify right side
    15,393.44x = 193,498,611.00
  5. Step 5: Solve for x
    x = 193,498,611.00/15,393.44
  6. Step 6: Final answer
    x = 12,570.20

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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.