Home / 20,729.28-31,093.60-5,147.04

Finding the Fourth Proportional to 20,729.28, 31,093.60 and 5,147.04

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Solution

The fourth proportional to 20,729.28, 31,093.60 and 5,147.04 is: 7,720.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.28 : 31,093.60 = 5,147.04 : x
  2. Step 2: Convert to fraction form
    20,729.28/31,093.60 = 5,147.04/x
  3. Step 3: Cross multiply
    20,729.28x = 31,093.60 × 5,147.04
  4. Step 4: Simplify right side
    20,729.28x = 160,040,002.94
  5. Step 5: Solve for x
    x = 160,040,002.94/20,729.28
  6. Step 6: Final answer
    x = 7,720.48

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1.5x scale

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.