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Finding the Fourth Proportional to 12,996.85, 17,940.51 and 10,119.89

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Solution

The fourth proportional to 12,996.85, 17,940.51 and 10,119.89 is: 13,969.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,996.85 : 17,940.51 = 10,119.89 : x
  2. Step 2: Convert to fraction form
    12,996.85/17,940.51 = 10,119.89/x
  3. Step 3: Cross multiply
    12,996.85x = 17,940.51 × 10,119.89
  4. Step 4: Simplify right side
    12,996.85x = 181,556,003.27
  5. Step 5: Solve for x
    x = 181,556,003.27/12,996.85
  6. Step 6: Final answer
    x = 13,969.23

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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.