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Finding the Fourth Proportional to 18,968.11, 28,438.08 and 9,097.99

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Solution

The fourth proportional to 18,968.11, 28,438.08 and 9,097.99 is: 13,640.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,968.11 : 28,438.08 = 9,097.99 : x
  2. Step 2: Convert to fraction form
    18,968.11/28,438.08 = 9,097.99/x
  3. Step 3: Cross multiply
    18,968.11x = 28,438.08 × 9,097.99
  4. Step 4: Simplify right side
    18,968.11x = 258,729,367.46
  5. Step 5: Solve for x
    x = 258,729,367.46/18,968.11
  6. Step 6: Final answer
    x = 13,640.23

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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.