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Finding the Fourth Proportional to 18,993.44, 28,490.06 and 5,142.44

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Solution

The fourth proportional to 18,993.44, 28,490.06 and 5,142.44 is: 7,713.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,993.44 : 28,490.06 = 5,142.44 : x
  2. Step 2: Convert to fraction form
    18,993.44/28,490.06 = 5,142.44/x
  3. Step 3: Cross multiply
    18,993.44x = 28,490.06 × 5,142.44
  4. Step 4: Simplify right side
    18,993.44x = 146,508,424.15
  5. Step 5: Solve for x
    x = 146,508,424.15/18,993.44
  6. Step 6: Final answer
    x = 7,713.63

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1.5x scale

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.