Home / 20,188.91-27,861.50-11,236.79

Finding the Fourth Proportional to 20,188.91, 27,861.50 and 11,236.79

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Solution

The fourth proportional to 20,188.91, 27,861.50 and 11,236.79 is: 15,507.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,188.91 : 27,861.50 = 11,236.79 : x
  2. Step 2: Convert to fraction form
    20,188.91/27,861.50 = 11,236.79/x
  3. Step 3: Cross multiply
    20,188.91x = 27,861.50 × 11,236.79
  4. Step 4: Simplify right side
    20,188.91x = 313,073,824.59
  5. Step 5: Solve for x
    x = 313,073,824.59/20,188.91
  6. Step 6: Final answer
    x = 15,507.22

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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.