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Finding the Fourth Proportional to 18,651.15, 27,976.80 and 7,558.05

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Solution

The fourth proportional to 18,651.15, 27,976.80 and 7,558.05 is: 11,337.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,651.15 : 27,976.80 = 7,558.05 : x
  2. Step 2: Convert to fraction form
    18,651.15/27,976.80 = 7,558.05/x
  3. Step 3: Cross multiply
    18,651.15x = 27,976.80 × 7,558.05
  4. Step 4: Simplify right side
    18,651.15x = 211,450,053.24
  5. Step 5: Solve for x
    x = 211,450,053.24/18,651.15
  6. Step 6: Final answer
    x = 11,337.11

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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.