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Finding the Fourth Proportional to 18,855.72, 28,264.14 and 6,371.64

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Solution

The fourth proportional to 18,855.72, 28,264.14 and 6,371.64 is: 9,550.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,855.72 : 28,264.14 = 6,371.64 : x
  2. Step 2: Convert to fraction form
    18,855.72/28,264.14 = 6,371.64/x
  3. Step 3: Cross multiply
    18,855.72x = 28,264.14 × 6,371.64
  4. Step 4: Simplify right side
    18,855.72x = 180,088,924.99
  5. Step 5: Solve for x
    x = 180,088,924.99/18,855.72
  6. Step 6: Final answer
    x = 9,550.89

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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.