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Finding the Fourth Proportional to 13,198.78, 18,214.44 and 7,609.78

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Solution

The fourth proportional to 13,198.78, 18,214.44 and 7,609.78 is: 10,501.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,198.78 : 18,214.44 = 7,609.78 : x
  2. Step 2: Convert to fraction form
    13,198.78/18,214.44 = 7,609.78/x
  3. Step 3: Cross multiply
    13,198.78x = 18,214.44 × 7,609.78
  4. Step 4: Simplify right side
    13,198.78x = 138,607,881.22
  5. Step 5: Solve for x
    x = 138,607,881.22/13,198.78
  6. Step 6: Final answer
    x = 10,501.57

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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.