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Finding the Fourth Proportional to 18,963, 28,444.50 and 5,112

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Solution

The fourth proportional to 18,963, 28,444.50 and 5,112 is: 7,668

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,963 : 28,444.50 = 5,112 : x
  2. Step 2: Convert to fraction form
    18,963/28,444.50 = 5,112/x
  3. Step 3: Cross multiply
    18,963x = 28,444.50 × 5,112
  4. Step 4: Simplify right side
    18,963x = 145,408,284
  5. Step 5: Solve for x
    x = 145,408,284/18,963
  6. Step 6: Final answer
    x = 7,668

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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.