Home / 20,790.05-31,164.05-8,951.54

Finding the Fourth Proportional to 20,790.05, 31,164.05 and 8,951.54

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Solution

The fourth proportional to 20,790.05, 31,164.05 and 8,951.54 is: 13,418.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.05 : 31,164.05 = 8,951.54 : x
  2. Step 2: Convert to fraction form
    20,790.05/31,164.05 = 8,951.54/x
  3. Step 3: Cross multiply
    20,790.05x = 31,164.05 × 8,951.54
  4. Step 4: Simplify right side
    20,790.05x = 278,966,240.14
  5. Step 5: Solve for x
    x = 278,966,240.14/20,790.05
  6. Step 6: Final answer
    x = 13,418.26

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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.