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Finding the Fourth Proportional to 18,752.29, 28,136.19 and 8,216.87

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Solution

The fourth proportional to 18,752.29, 28,136.19 and 8,216.87 is: 12,328.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,752.29 : 28,136.19 = 8,216.87 : x
  2. Step 2: Convert to fraction form
    18,752.29/28,136.19 = 8,216.87/x
  3. Step 3: Cross multiply
    18,752.29x = 28,136.19 × 8,216.87
  4. Step 4: Simplify right side
    18,752.29x = 231,191,415.53
  5. Step 5: Solve for x
    x = 231,191,415.53/18,752.29
  6. Step 6: Final answer
    x = 12,328.71

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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.