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Finding the Fourth Proportional to 8,668, 11,962.56 and 4,942.72

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Solution

The fourth proportional to 8,668, 11,962.56 and 4,942.72 is: 6,821.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,668 : 11,962.56 = 4,942.72 : x
  2. Step 2: Convert to fraction form
    8,668/11,962.56 = 4,942.72/x
  3. Step 3: Cross multiply
    8,668x = 11,962.56 × 4,942.72
  4. Step 4: Simplify right side
    8,668x = 59,127,584.56
  5. Step 5: Solve for x
    x = 59,127,584.56/8,668
  6. Step 6: Final answer
    x = 6,821.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.