Home / 20,740.07-31,141.25-11,865.41

Finding the Fourth Proportional to 20,740.07, 31,141.25 and 11,865.41

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Solution

The fourth proportional to 20,740.07, 31,141.25 and 11,865.41 is: 17,815.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.07 : 31,141.25 = 11,865.41 : x
  2. Step 2: Convert to fraction form
    20,740.07/31,141.25 = 11,865.41/x
  3. Step 3: Cross multiply
    20,740.07x = 31,141.25 × 11,865.41
  4. Step 4: Simplify right side
    20,740.07x = 369,503,717.69
  5. Step 5: Solve for x
    x = 369,503,717.69/20,740.07
  6. Step 6: Final answer
    x = 17,815.94

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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.