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Finding the Fourth Proportional to 18,890.38, 28,348.44 and 7,797.02

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Solution

The fourth proportional to 18,890.38, 28,348.44 and 7,797.02 is: 11,700.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,890.38 : 28,348.44 = 7,797.02 : x
  2. Step 2: Convert to fraction form
    18,890.38/28,348.44 = 7,797.02/x
  3. Step 3: Cross multiply
    18,890.38x = 28,348.44 × 7,797.02
  4. Step 4: Simplify right side
    18,890.38x = 221,033,353.65
  5. Step 5: Solve for x
    x = 221,033,353.65/18,890.38
  6. Step 6: Final answer
    x = 11,700.84

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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.