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Finding the Fourth Proportional to 18,668.52, 27,992.88 and 5,518.98

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Solution

The fourth proportional to 18,668.52, 27,992.88 and 5,518.98 is: 8,275.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.52 : 27,992.88 = 5,518.98 : x
  2. Step 2: Convert to fraction form
    18,668.52/27,992.88 = 5,518.98/x
  3. Step 3: Cross multiply
    18,668.52x = 27,992.88 × 5,518.98
  4. Step 4: Simplify right side
    18,668.52x = 154,492,144.86
  5. Step 5: Solve for x
    x = 154,492,144.86/18,668.52
  6. Step 6: Final answer
    x = 8,275.54

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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.