Home / 13,458.42-20,191.68-5,138.64

Finding the Fourth Proportional to 13,458.42, 20,191.68 and 5,138.64

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Solution

The fourth proportional to 13,458.42, 20,191.68 and 5,138.64 is: 7,709.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,458.42 : 20,191.68 = 5,138.64 : x
  2. Step 2: Convert to fraction form
    13,458.42/20,191.68 = 5,138.64/x
  3. Step 3: Cross multiply
    13,458.42x = 20,191.68 × 5,138.64
  4. Step 4: Simplify right side
    13,458.42x = 103,757,774.52
  5. Step 5: Solve for x
    x = 103,757,774.52/13,458.42
  6. Step 6: Final answer
    x = 7,709.51

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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.