Home / 20,088.78-27,722.64-11,135.88

Finding the Fourth Proportional to 20,088.78, 27,722.64 and 11,135.88

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Solution

The fourth proportional to 20,088.78, 27,722.64 and 11,135.88 is: 15,367.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,088.78 : 27,722.64 = 11,135.88 : x
  2. Step 2: Convert to fraction form
    20,088.78/27,722.64 = 11,135.88/x
  3. Step 3: Cross multiply
    20,088.78x = 27,722.64 × 11,135.88
  4. Step 4: Simplify right side
    20,088.78x = 308,715,992.32
  5. Step 5: Solve for x
    x = 308,715,992.32/20,088.78
  6. Step 6: Final answer
    x = 15,367.58

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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.