Home / 20,221.20-27,905.84-11,723.35

Finding the Fourth Proportional to 20,221.20, 27,905.84 and 11,723.35

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Solution

The fourth proportional to 20,221.20, 27,905.84 and 11,723.35 is: 16,178.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.20 : 27,905.84 = 11,723.35 : x
  2. Step 2: Convert to fraction form
    20,221.20/27,905.84 = 11,723.35/x
  3. Step 3: Cross multiply
    20,221.20x = 27,905.84 × 11,723.35
  4. Step 4: Simplify right side
    20,221.20x = 327,149,929.36
  5. Step 5: Solve for x
    x = 327,149,929.36/20,221.20
  6. Step 6: Final answer
    x = 16,178.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.