Home / 20,106.78-27,747.80-11,154

Finding the Fourth Proportional to 20,106.78, 27,747.80 and 11,154

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Solution

The fourth proportional to 20,106.78, 27,747.80 and 11,154 is: 15,392.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,106.78 : 27,747.80 = 11,154 : x
  2. Step 2: Convert to fraction form
    20,106.78/27,747.80 = 11,154/x
  3. Step 3: Cross multiply
    20,106.78x = 27,747.80 × 11,154
  4. Step 4: Simplify right side
    20,106.78x = 309,498,961.20
  5. Step 5: Solve for x
    x = 309,498,961.20/20,106.78
  6. Step 6: Final answer
    x = 15,392.77

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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.