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Finding the Fourth Proportional to 18,993.28, 28,493.12 and 5,845.28

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Solution

The fourth proportional to 18,993.28, 28,493.12 and 5,845.28 is: 8,768.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,993.28 : 28,493.12 = 5,845.28 : x
  2. Step 2: Convert to fraction form
    18,993.28/28,493.12 = 5,845.28/x
  3. Step 3: Cross multiply
    18,993.28x = 28,493.12 × 5,845.28
  4. Step 4: Simplify right side
    18,993.28x = 166,550,264.47
  5. Step 5: Solve for x
    x = 166,550,264.47/18,993.28
  6. Step 6: Final answer
    x = 8,768.90

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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.