Home / 20,139.36-27,793.50-11,187.84

Finding the Fourth Proportional to 20,139.36, 27,793.50 and 11,187.84

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Solution

The fourth proportional to 20,139.36, 27,793.50 and 11,187.84 is: 15,439.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.36 : 27,793.50 = 11,187.84 : x
  2. Step 2: Convert to fraction form
    20,139.36/27,793.50 = 11,187.84/x
  3. Step 3: Cross multiply
    20,139.36x = 27,793.50 × 11,187.84
  4. Step 4: Simplify right side
    20,139.36x = 310,949,231.04
  5. Step 5: Solve for x
    x = 310,949,231.04/20,139.36
  6. Step 6: Final answer
    x = 15,439.88

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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.