Home / 20,139.70-27,789.44-11,642.62

Finding the Fourth Proportional to 20,139.70, 27,789.44 and 11,642.62

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Solution

The fourth proportional to 20,139.70, 27,789.44 and 11,642.62 is: 16,064.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.70 : 27,789.44 = 11,642.62 : x
  2. Step 2: Convert to fraction form
    20,139.70/27,789.44 = 11,642.62/x
  3. Step 3: Cross multiply
    20,139.70x = 27,789.44 × 11,642.62
  4. Step 4: Simplify right side
    20,139.70x = 323,541,889.93
  5. Step 5: Solve for x
    x = 323,541,889.93/20,139.70
  6. Step 6: Final answer
    x = 16,064.88

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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.