Home / 21,181.85-31,772.41-5,171.54

Finding the Fourth Proportional to 21,181.85, 31,772.41 and 5,171.54

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Solution

The fourth proportional to 21,181.85, 31,772.41 and 5,171.54 is: 7,757.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.85 : 31,772.41 = 5,171.54 : x
  2. Step 2: Convert to fraction form
    21,181.85/31,772.41 = 5,171.54/x
  3. Step 3: Cross multiply
    21,181.85x = 31,772.41 × 5,171.54
  4. Step 4: Simplify right side
    21,181.85x = 164,312,289.21
  5. Step 5: Solve for x
    x = 164,312,289.21/21,181.85
  6. Step 6: Final answer
    x = 7,757.22

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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.