Home / 13,422.12-20,122.64-8,481.36

Finding the Fourth Proportional to 13,422.12, 20,122.64 and 8,481.36

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Solution

The fourth proportional to 13,422.12, 20,122.64 and 8,481.36 is: 12,715.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,422.12 : 20,122.64 = 8,481.36 : x
  2. Step 2: Convert to fraction form
    13,422.12/20,122.64 = 8,481.36/x
  3. Step 3: Cross multiply
    13,422.12x = 20,122.64 × 8,481.36
  4. Step 4: Simplify right side
    13,422.12x = 170,667,353.99
  5. Step 5: Solve for x
    x = 170,667,353.99/13,422.12
  6. Step 6: Final answer
    x = 12,715.38

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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.