Home / 13,629.72-20,420.28-9,231.42

Finding the Fourth Proportional to 13,629.72, 20,420.28 and 9,231.42

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Solution

The fourth proportional to 13,629.72, 20,420.28 and 9,231.42 is: 13,830.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,629.72 : 20,420.28 = 9,231.42 : x
  2. Step 2: Convert to fraction form
    13,629.72/20,420.28 = 9,231.42/x
  3. Step 3: Cross multiply
    13,629.72x = 20,420.28 × 9,231.42
  4. Step 4: Simplify right side
    13,629.72x = 188,508,181.20
  5. Step 5: Solve for x
    x = 188,508,181.20/13,629.72
  6. Step 6: Final answer
    x = 13,830.67

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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.