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Finding the Fourth Proportional to 19,268.70, 28,868.49 and 16,811.10

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Solution

The fourth proportional to 19,268.70, 28,868.49 and 16,811.10 is: 25,186.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,268.70 : 28,868.49 = 16,811.10 : x
  2. Step 2: Convert to fraction form
    19,268.70/28,868.49 = 16,811.10/x
  3. Step 3: Cross multiply
    19,268.70x = 28,868.49 × 16,811.10
  4. Step 4: Simplify right side
    19,268.70x = 485,311,072.24
  5. Step 5: Solve for x
    x = 485,311,072.24/19,268.70
  6. Step 6: Final answer
    x = 25,186.50

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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.