Home / 13,929.12-20,892.96-3,540.96

Finding the Fourth Proportional to 13,929.12, 20,892.96 and 3,540.96

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Solution

The fourth proportional to 13,929.12, 20,892.96 and 3,540.96 is: 5,311.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,929.12 : 20,892.96 = 3,540.96 : x
  2. Step 2: Convert to fraction form
    13,929.12/20,892.96 = 3,540.96/x
  3. Step 3: Cross multiply
    13,929.12x = 20,892.96 × 3,540.96
  4. Step 4: Simplify right side
    13,929.12x = 73,981,135.64
  5. Step 5: Solve for x
    x = 73,981,135.64/13,929.12
  6. Step 6: Final answer
    x = 5,311.26

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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.