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Finding the Fourth Proportional to 18,991.36, 28,489.74 and 5,844.82

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Solution

The fourth proportional to 18,991.36, 28,489.74 and 5,844.82 is: 8,768.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.36 : 28,489.74 = 5,844.82 : x
  2. Step 2: Convert to fraction form
    18,991.36/28,489.74 = 5,844.82/x
  3. Step 3: Cross multiply
    18,991.36x = 28,489.74 × 5,844.82
  4. Step 4: Simplify right side
    18,991.36x = 166,517,402.15
  5. Step 5: Solve for x
    x = 166,517,402.15/18,991.36
  6. Step 6: Final answer
    x = 8,768.06

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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.