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Finding the Fourth Proportional to 13,869.19, 20,803.17 and 3,873.99

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Solution

The fourth proportional to 13,869.19, 20,803.17 and 3,873.99 is: 5,810.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,869.19 : 20,803.17 = 3,873.99 : x
  2. Step 2: Convert to fraction form
    13,869.19/20,803.17 = 3,873.99/x
  3. Step 3: Cross multiply
    13,869.19x = 20,803.17 × 3,873.99
  4. Step 4: Simplify right side
    13,869.19x = 80,591,272.55
  5. Step 5: Solve for x
    x = 80,591,272.55/13,869.19
  6. Step 6: Final answer
    x = 5,810.82

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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.