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Finding the Fourth Proportional to 18,605.19, 27,907.92 and 6,918.39

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Solution

The fourth proportional to 18,605.19, 27,907.92 and 6,918.39 is: 10,377.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,605.19 : 27,907.92 = 6,918.39 : x
  2. Step 2: Convert to fraction form
    18,605.19/27,907.92 = 6,918.39/x
  3. Step 3: Cross multiply
    18,605.19x = 27,907.92 × 6,918.39
  4. Step 4: Simplify right side
    18,605.19x = 193,077,874.65
  5. Step 5: Solve for x
    x = 193,077,874.65/18,605.19
  6. Step 6: Final answer
    x = 10,377.64

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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.