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Finding the Fourth Proportional to 12,668.71, 17,478.55 and 8,198.11

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Solution

The fourth proportional to 12,668.71, 17,478.55 and 8,198.11 is: 11,310.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,668.71 : 17,478.55 = 8,198.11 : x
  2. Step 2: Convert to fraction form
    12,668.71/17,478.55 = 8,198.11/x
  3. Step 3: Cross multiply
    12,668.71x = 17,478.55 × 8,198.11
  4. Step 4: Simplify right side
    12,668.71x = 143,291,034.55
  5. Step 5: Solve for x
    x = 143,291,034.55/12,668.71
  6. Step 6: Final answer
    x = 11,310.63

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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.