Home / 13,421.73-20,128.04-5,099.75

Finding the Fourth Proportional to 13,421.73, 20,128.04 and 5,099.75

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Solution

The fourth proportional to 13,421.73, 20,128.04 and 5,099.75 is: 7,647.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.73 : 20,128.04 = 5,099.75 : x
  2. Step 2: Convert to fraction form
    13,421.73/20,128.04 = 5,099.75/x
  3. Step 3: Cross multiply
    13,421.73x = 20,128.04 × 5,099.75
  4. Step 4: Simplify right side
    13,421.73x = 102,647,845.85
  5. Step 5: Solve for x
    x = 102,647,845.85/13,421.73
  6. Step 6: Final answer
    x = 7,647.88

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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.