Home / 21,180.85-31,770.91-5,170.54

Finding the Fourth Proportional to 21,180.85, 31,770.91 and 5,170.54

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Solution

The fourth proportional to 21,180.85, 31,770.91 and 5,170.54 is: 7,755.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.85 : 31,770.91 = 5,170.54 : x
  2. Step 2: Convert to fraction form
    21,180.85/31,770.91 = 5,170.54/x
  3. Step 3: Cross multiply
    21,180.85x = 31,770.91 × 5,170.54
  4. Step 4: Simplify right side
    21,180.85x = 164,272,760.99
  5. Step 5: Solve for x
    x = 164,272,760.99/21,180.85
  6. Step 6: Final answer
    x = 7,755.72

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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.