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Finding the Fourth Proportional to 18,653.92, 27,976.74 and 5,503.21

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Solution

The fourth proportional to 18,653.92, 27,976.74 and 5,503.21 is: 8,253.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,653.92 : 27,976.74 = 5,503.21 : x
  2. Step 2: Convert to fraction form
    18,653.92/27,976.74 = 5,503.21/x
  3. Step 3: Cross multiply
    18,653.92x = 27,976.74 × 5,503.21
  4. Step 4: Simplify right side
    18,653.92x = 153,961,784.76
  5. Step 5: Solve for x
    x = 153,961,784.76/18,653.92
  6. Step 6: Final answer
    x = 8,253.59

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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.