Home / 20,205.32-27,882.24-11,128.91

Finding the Fourth Proportional to 20,205.32, 27,882.24 and 11,128.91

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Solution

The fourth proportional to 20,205.32, 27,882.24 and 11,128.91 is: 15,357.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,205.32 : 27,882.24 = 11,128.91 : x
  2. Step 2: Convert to fraction form
    20,205.32/27,882.24 = 11,128.91/x
  3. Step 3: Cross multiply
    20,205.32x = 27,882.24 × 11,128.91
  4. Step 4: Simplify right side
    20,205.32x = 310,299,009.26
  5. Step 5: Solve for x
    x = 310,299,009.26/20,205.32
  6. Step 6: Final answer
    x = 15,357.29

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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.