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Finding the Fourth Proportional to 13,745.21, 20,619.43 and 7,901.87

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Solution

The fourth proportional to 13,745.21, 20,619.43 and 7,901.87 is: 11,853.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,745.21 : 20,619.43 = 7,901.87 : x
  2. Step 2: Convert to fraction form
    13,745.21/20,619.43 = 7,901.87/x
  3. Step 3: Cross multiply
    13,745.21x = 20,619.43 × 7,901.87
  4. Step 4: Simplify right side
    13,745.21x = 162,931,932.48
  5. Step 5: Solve for x
    x = 162,931,932.48/13,745.21
  6. Step 6: Final answer
    x = 11,853.73

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.