Home / 21,287.53-31,930.48-5,704.75

Finding the Fourth Proportional to 21,287.53, 31,930.48 and 5,704.75

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Solution

The fourth proportional to 21,287.53, 31,930.48 and 5,704.75 is: 8,556.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.53 : 31,930.48 = 5,704.75 : x
  2. Step 2: Convert to fraction form
    21,287.53/31,930.48 = 5,704.75/x
  3. Step 3: Cross multiply
    21,287.53x = 31,930.48 × 5,704.75
  4. Step 4: Simplify right side
    21,287.53x = 182,155,405.78
  5. Step 5: Solve for x
    x = 182,155,405.78/21,287.53
  6. Step 6: Final answer
    x = 8,556.91

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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.