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Finding the Fourth Proportional to 18,566.36, 27,846.80 and 5,415.20

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Solution

The fourth proportional to 18,566.36, 27,846.80 and 5,415.20 is: 8,122.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,566.36 : 27,846.80 = 5,415.20 : x
  2. Step 2: Convert to fraction form
    18,566.36/27,846.80 = 5,415.20/x
  3. Step 3: Cross multiply
    18,566.36x = 27,846.80 × 5,415.20
  4. Step 4: Simplify right side
    18,566.36x = 150,795,991.36
  5. Step 5: Solve for x
    x = 150,795,991.36/18,566.36
  6. Step 6: Final answer
    x = 8,122.00

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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.