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Finding the Fourth Proportional to 18,855.13, 28,282.74 and 6,371.82

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Solution

The fourth proportional to 18,855.13, 28,282.74 and 6,371.82 is: 9,557.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,855.13 : 28,282.74 = 6,371.82 : x
  2. Step 2: Convert to fraction form
    18,855.13/28,282.74 = 6,371.82/x
  3. Step 3: Cross multiply
    18,855.13x = 28,282.74 × 6,371.82
  4. Step 4: Simplify right side
    18,855.13x = 180,212,528.39
  5. Step 5: Solve for x
    x = 180,212,528.39/18,855.13
  6. Step 6: Final answer
    x = 9,557.75

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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.