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Finding the Fourth Proportional to 18,642.90, 27,936.18 and 11,239.08

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Solution

The fourth proportional to 18,642.90, 27,936.18 and 11,239.08 is: 16,841.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,642.90 : 27,936.18 = 11,239.08 : x
  2. Step 2: Convert to fraction form
    18,642.90/27,936.18 = 11,239.08/x
  3. Step 3: Cross multiply
    18,642.90x = 27,936.18 × 11,239.08
  4. Step 4: Simplify right side
    18,642.90x = 313,976,961.91
  5. Step 5: Solve for x
    x = 313,976,961.91/18,642.90
  6. Step 6: Final answer
    x = 16,841.64

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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.