Home / 20,936.20-31,404.30-8,462.20

Finding the Fourth Proportional to 20,936.20, 31,404.30 and 8,462.20

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Solution

The fourth proportional to 20,936.20, 31,404.30 and 8,462.20 is: 12,693.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.20 : 31,404.30 = 8,462.20 : x
  2. Step 2: Convert to fraction form
    20,936.20/31,404.30 = 8,462.20/x
  3. Step 3: Cross multiply
    20,936.20x = 31,404.30 × 8,462.20
  4. Step 4: Simplify right side
    20,936.20x = 265,749,467.46
  5. Step 5: Solve for x
    x = 265,749,467.46/20,936.20
  6. Step 6: Final answer
    x = 12,693.30

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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.