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Finding the Fourth Proportional to 18,743.95, 28,115.93 and 4,892.95

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Solution

The fourth proportional to 18,743.95, 28,115.93 and 4,892.95 is: 7,339.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,743.95 : 28,115.93 = 4,892.95 : x
  2. Step 2: Convert to fraction form
    18,743.95/28,115.93 = 4,892.95/x
  3. Step 3: Cross multiply
    18,743.95x = 28,115.93 × 4,892.95
  4. Step 4: Simplify right side
    18,743.95x = 137,569,839.69
  5. Step 5: Solve for x
    x = 137,569,839.69/18,743.95
  6. Step 6: Final answer
    x = 7,339.43

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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.