Home / 20,142.78-27,797.36-11,191.11

Finding the Fourth Proportional to 20,142.78, 27,797.36 and 11,191.11

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Solution

The fourth proportional to 20,142.78, 27,797.36 and 11,191.11 is: 15,443.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.78 : 27,797.36 = 11,191.11 : x
  2. Step 2: Convert to fraction form
    20,142.78/27,797.36 = 11,191.11/x
  3. Step 3: Cross multiply
    20,142.78x = 27,797.36 × 11,191.11
  4. Step 4: Simplify right side
    20,142.78x = 311,083,257.51
  5. Step 5: Solve for x
    x = 311,083,257.51/20,142.78
  6. Step 6: Final answer
    x = 15,443.91

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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.