Home / 20,138.95-27,789.64-11,184.81

Finding the Fourth Proportional to 20,138.95, 27,789.64 and 11,184.81

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Solution

The fourth proportional to 20,138.95, 27,789.64 and 11,184.81 is: 15,433.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.95 : 27,789.64 = 11,184.81 : x
  2. Step 2: Convert to fraction form
    20,138.95/27,789.64 = 11,184.81/x
  3. Step 3: Cross multiply
    20,138.95x = 27,789.64 × 11,184.81
  4. Step 4: Simplify right side
    20,138.95x = 310,821,843.37
  5. Step 5: Solve for x
    x = 310,821,843.37/20,138.95
  6. Step 6: Final answer
    x = 15,433.87

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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.