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Finding the Fourth Proportional to 15,194.44, 20,963.40 and 8,479

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Solution

The fourth proportional to 15,194.44, 20,963.40 and 8,479 is: 11,698.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,194.44 : 20,963.40 = 8,479 : x
  2. Step 2: Convert to fraction form
    15,194.44/20,963.40 = 8,479/x
  3. Step 3: Cross multiply
    15,194.44x = 20,963.40 × 8,479
  4. Step 4: Simplify right side
    15,194.44x = 177,748,668.60
  5. Step 5: Solve for x
    x = 177,748,668.60/15,194.44
  6. Step 6: Final answer
    x = 11,698.27

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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.