Home / 20,105.78-27,746.42-11,152.99

Finding the Fourth Proportional to 20,105.78, 27,746.42 and 11,152.99

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Solution

The fourth proportional to 20,105.78, 27,746.42 and 11,152.99 is: 15,391.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.78 : 27,746.42 = 11,152.99 : x
  2. Step 2: Convert to fraction form
    20,105.78/27,746.42 = 11,152.99/x
  3. Step 3: Cross multiply
    20,105.78x = 27,746.42 × 11,152.99
  4. Step 4: Simplify right side
    20,105.78x = 309,455,544.80
  5. Step 5: Solve for x
    x = 309,455,544.80/20,105.78
  6. Step 6: Final answer
    x = 15,391.37

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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.