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Finding the Fourth Proportional to 12,863.79, 17,749.53 and 7,198.80

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Solution

The fourth proportional to 12,863.79, 17,749.53 and 7,198.80 is: 9,932.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,863.79 : 17,749.53 = 7,198.80 : x
  2. Step 2: Convert to fraction form
    12,863.79/17,749.53 = 7,198.80/x
  3. Step 3: Cross multiply
    12,863.79x = 17,749.53 × 7,198.80
  4. Step 4: Simplify right side
    12,863.79x = 127,775,316.56
  5. Step 5: Solve for x
    x = 127,775,316.56/12,863.79
  6. Step 6: Final answer
    x = 9,932.94

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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.