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Finding the Fourth Proportional to 18,448.80, 27,674.76 and 7,919.28

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Solution

The fourth proportional to 18,448.80, 27,674.76 and 7,919.28 is: 11,879.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,448.80 : 27,674.76 = 7,919.28 : x
  2. Step 2: Convert to fraction form
    18,448.80/27,674.76 = 7,919.28/x
  3. Step 3: Cross multiply
    18,448.80x = 27,674.76 × 7,919.28
  4. Step 4: Simplify right side
    18,448.80x = 219,164,173.37
  5. Step 5: Solve for x
    x = 219,164,173.37/18,448.80
  6. Step 6: Final answer
    x = 11,879.59

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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.