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Finding the Fourth Proportional to 12,729.75, 17,566.26 and 7,690.99

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Solution

The fourth proportional to 12,729.75, 17,566.26 and 7,690.99 is: 10,613.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,729.75 : 17,566.26 = 7,690.99 : x
  2. Step 2: Convert to fraction form
    12,729.75/17,566.26 = 7,690.99/x
  3. Step 3: Cross multiply
    12,729.75x = 17,566.26 × 7,690.99
  4. Step 4: Simplify right side
    12,729.75x = 135,101,891.54
  5. Step 5: Solve for x
    x = 135,101,891.54/12,729.75
  6. Step 6: Final answer
    x = 10,613.09

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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.