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Finding the Fourth Proportional to 13,919.80, 20,887.02 and 6,133.96

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Solution

The fourth proportional to 13,919.80, 20,887.02 and 6,133.96 is: 9,204.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,919.80 : 20,887.02 = 6,133.96 : x
  2. Step 2: Convert to fraction form
    13,919.80/20,887.02 = 6,133.96/x
  3. Step 3: Cross multiply
    13,919.80x = 20,887.02 × 6,133.96
  4. Step 4: Simplify right side
    13,919.80x = 128,120,145.20
  5. Step 5: Solve for x
    x = 128,120,145.20/13,919.80
  6. Step 6: Final answer
    x = 9,204.17

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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.