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Finding the Fourth Proportional to 18,976.44, 28,461.99 and 11,934.99

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Solution

The fourth proportional to 18,976.44, 28,461.99 and 11,934.99 is: 17,900.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,976.44 : 28,461.99 = 11,934.99 : x
  2. Step 2: Convert to fraction form
    18,976.44/28,461.99 = 11,934.99/x
  3. Step 3: Cross multiply
    18,976.44x = 28,461.99 × 11,934.99
  4. Step 4: Simplify right side
    18,976.44x = 339,693,566.03
  5. Step 5: Solve for x
    x = 339,693,566.03/18,976.44
  6. Step 6: Final answer
    x = 17,900.81

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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.