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Finding the Fourth Proportional to 18,839.27, 28,239.77 and 8,315.02

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Solution

The fourth proportional to 18,839.27, 28,239.77 and 8,315.02 is: 12,464.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,839.27 : 28,239.77 = 8,315.02 : x
  2. Step 2: Convert to fraction form
    18,839.27/28,239.77 = 8,315.02/x
  3. Step 3: Cross multiply
    18,839.27x = 28,239.77 × 8,315.02
  4. Step 4: Simplify right side
    18,839.27x = 234,814,252.35
  5. Step 5: Solve for x
    x = 234,814,252.35/18,839.27
  6. Step 6: Final answer
    x = 12,464.08

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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.