Home / 20,138.39-27,791.91-11,185.94

Finding the Fourth Proportional to 20,138.39, 27,791.91 and 11,185.94

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Solution

The fourth proportional to 20,138.39, 27,791.91 and 11,185.94 is: 15,437.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.39 : 27,791.91 = 11,185.94 : x
  2. Step 2: Convert to fraction form
    20,138.39/27,791.91 = 11,185.94/x
  3. Step 3: Cross multiply
    20,138.39x = 27,791.91 × 11,185.94
  4. Step 4: Simplify right side
    20,138.39x = 310,878,498.79
  5. Step 5: Solve for x
    x = 310,878,498.79/20,138.39
  6. Step 6: Final answer
    x = 15,437.11

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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.