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Finding the Fourth Proportional to 8,668.88, 12,992.72 and 3,728.08

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Solution

The fourth proportional to 8,668.88, 12,992.72 and 3,728.08 is: 5,587.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,668.88 : 12,992.72 = 3,728.08 : x
  2. Step 2: Convert to fraction form
    8,668.88/12,992.72 = 3,728.08/x
  3. Step 3: Cross multiply
    8,668.88x = 12,992.72 × 3,728.08
  4. Step 4: Simplify right side
    8,668.88x = 48,437,899.58
  5. Step 5: Solve for x
    x = 48,437,899.58/8,668.88
  6. Step 6: Final answer
    x = 5,587.56

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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.