Home / 20,139.53-27,793.38-11,187.09

Finding the Fourth Proportional to 20,139.53, 27,793.38 and 11,187.09

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Solution

The fourth proportional to 20,139.53, 27,793.38 and 11,187.09 is: 15,438.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.53 : 27,793.38 = 11,187.09 : x
  2. Step 2: Convert to fraction form
    20,139.53/27,793.38 = 11,187.09/x
  3. Step 3: Cross multiply
    20,139.53x = 27,793.38 × 11,187.09
  4. Step 4: Simplify right side
    20,139.53x = 310,927,043.46
  5. Step 5: Solve for x
    x = 310,927,043.46/20,139.53
  6. Step 6: Final answer
    x = 15,438.65

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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.