Home / 20,939.42-28,896.99-11,508.59

Finding the Fourth Proportional to 20,939.42, 28,896.99 and 11,508.59

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Solution

The fourth proportional to 20,939.42, 28,896.99 and 11,508.59 is: 15,882.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.42 : 28,896.99 = 11,508.59 : x
  2. Step 2: Convert to fraction form
    20,939.42/28,896.99 = 11,508.59/x
  3. Step 3: Cross multiply
    20,939.42x = 28,896.99 × 11,508.59
  4. Step 4: Simplify right side
    20,939.42x = 332,563,610.14
  5. Step 5: Solve for x
    x = 332,563,610.14/20,939.42
  6. Step 6: Final answer
    x = 15,882.18

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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.