Home / 20,736.78-31,105.14-5,154.41

Finding the Fourth Proportional to 20,736.78, 31,105.14 and 5,154.41

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Solution

The fourth proportional to 20,736.78, 31,105.14 and 5,154.41 is: 7,731.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736.78 : 31,105.14 = 5,154.41 : x
  2. Step 2: Convert to fraction form
    20,736.78/31,105.14 = 5,154.41/x
  3. Step 3: Cross multiply
    20,736.78x = 31,105.14 × 5,154.41
  4. Step 4: Simplify right side
    20,736.78x = 160,328,630.11
  5. Step 5: Solve for x
    x = 160,328,630.11/20,736.78
  6. Step 6: Final answer
    x = 7,731.61

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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.