Home / 20,740.62-31,142.09-11,865.97

Finding the Fourth Proportional to 20,740.62, 31,142.09 and 11,865.97

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Solution

The fourth proportional to 20,740.62, 31,142.09 and 11,865.97 is: 17,816.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.62 : 31,142.09 = 11,865.97 : x
  2. Step 2: Convert to fraction form
    20,740.62/31,142.09 = 11,865.97/x
  3. Step 3: Cross multiply
    20,740.62x = 31,142.09 × 11,865.97
  4. Step 4: Simplify right side
    20,740.62x = 369,531,201.38
  5. Step 5: Solve for x
    x = 369,531,201.38/20,740.62
  6. Step 6: Final answer
    x = 17,816.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.