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Finding the Fourth Proportional to 18,799, 28,198.95 and 6,319.18

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Solution

The fourth proportional to 18,799, 28,198.95 and 6,319.18 is: 9,478.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,799 : 28,198.95 = 6,319.18 : x
  2. Step 2: Convert to fraction form
    18,799/28,198.95 = 6,319.18/x
  3. Step 3: Cross multiply
    18,799x = 28,198.95 × 6,319.18
  4. Step 4: Simplify right side
    18,799x = 178,194,240.86
  5. Step 5: Solve for x
    x = 178,194,240.86/18,799
  6. Step 6: Final answer
    x = 9,478.92

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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.