Home / 20,139.75-27,793.23-11,188.08

Finding the Fourth Proportional to 20,139.75, 27,793.23 and 11,188.08

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Solution

The fourth proportional to 20,139.75, 27,793.23 and 11,188.08 is: 15,439.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.75 : 27,793.23 = 11,188.08 : x
  2. Step 2: Convert to fraction form
    20,139.75/27,793.23 = 11,188.08/x
  3. Step 3: Cross multiply
    20,139.75x = 27,793.23 × 11,188.08
  4. Step 4: Simplify right side
    20,139.75x = 310,952,880.70
  5. Step 5: Solve for x
    x = 310,952,880.70/20,139.75
  6. Step 6: Final answer
    x = 15,439.76

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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.