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Finding the Fourth Proportional to 18,815, 28,218.90 and 9,452.51

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Solution

The fourth proportional to 18,815, 28,218.90 and 9,452.51 is: 14,176.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815 : 28,218.90 = 9,452.51 : x
  2. Step 2: Convert to fraction form
    18,815/28,218.90 = 9,452.51/x
  3. Step 3: Cross multiply
    18,815x = 28,218.90 × 9,452.51
  4. Step 4: Simplify right side
    18,815x = 266,739,434.44
  5. Step 5: Solve for x
    x = 266,739,434.44/18,815
  6. Step 6: Final answer
    x = 14,176.96

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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.