Home / 18,081.78-27,123.39-7,686.42

Finding the Fourth Proportional to 18,081.78, 27,123.39 and 7,686.42

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Solution

The fourth proportional to 18,081.78, 27,123.39 and 7,686.42 is: 11,529.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,081.78 : 27,123.39 = 7,686.42 : x
  2. Step 2: Convert to fraction form
    18,081.78/27,123.39 = 7,686.42/x
  3. Step 3: Cross multiply
    18,081.78x = 27,123.39 × 7,686.42
  4. Step 4: Simplify right side
    18,081.78x = 208,481,767.36
  5. Step 5: Solve for x
    x = 208,481,767.36/18,081.78
  6. Step 6: Final answer
    x = 11,529.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.