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Finding the Fourth Proportional to 18,618.48, 27,928.36 and 9,379.44

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Solution

The fourth proportional to 18,618.48, 27,928.36 and 9,379.44 is: 14,069.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,618.48 : 27,928.36 = 9,379.44 : x
  2. Step 2: Convert to fraction form
    18,618.48/27,928.36 = 9,379.44/x
  3. Step 3: Cross multiply
    18,618.48x = 27,928.36 × 9,379.44
  4. Step 4: Simplify right side
    18,618.48x = 261,952,376.92
  5. Step 5: Solve for x
    x = 261,952,376.92/18,618.48
  6. Step 6: Final answer
    x = 14,069.48

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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.