Home / 20,961.78-31,442.69-5,166.81

Finding the Fourth Proportional to 20,961.78, 31,442.69 and 5,166.81

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Solution

The fourth proportional to 20,961.78, 31,442.69 and 5,166.81 is: 7,750.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.78 : 31,442.69 = 5,166.81 : x
  2. Step 2: Convert to fraction form
    20,961.78/31,442.69 = 5,166.81/x
  3. Step 3: Cross multiply
    20,961.78x = 31,442.69 × 5,166.81
  4. Step 4: Simplify right side
    20,961.78x = 162,458,379.28
  5. Step 5: Solve for x
    x = 162,458,379.28/20,961.78
  6. Step 6: Final answer
    x = 7,750.22

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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.