Home / 18,138.87-27,176.40-11,815.56

Finding the Fourth Proportional to 18,138.87, 27,176.40 and 11,815.56

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Solution

The fourth proportional to 18,138.87, 27,176.40 and 11,815.56 is: 17,702.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.87 : 27,176.40 = 11,815.56 : x
  2. Step 2: Convert to fraction form
    18,138.87/27,176.40 = 11,815.56/x
  3. Step 3: Cross multiply
    18,138.87x = 27,176.40 × 11,815.56
  4. Step 4: Simplify right side
    18,138.87x = 321,104,384.78
  5. Step 5: Solve for x
    x = 321,104,384.78/18,138.87
  6. Step 6: Final answer
    x = 17,702.56

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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.