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Finding the Fourth Proportional to 13,887.21, 20,832.87 and 4,025.21

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Solution

The fourth proportional to 13,887.21, 20,832.87 and 4,025.21 is: 6,038.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,887.21 : 20,832.87 = 4,025.21 : x
  2. Step 2: Convert to fraction form
    13,887.21/20,832.87 = 4,025.21/x
  3. Step 3: Cross multiply
    13,887.21x = 20,832.87 × 4,025.21
  4. Step 4: Simplify right side
    13,887.21x = 83,856,704.77
  5. Step 5: Solve for x
    x = 83,856,704.77/13,887.21
  6. Step 6: Final answer
    x = 6,038.41

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1.5x scale

Why These Related Problems?

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