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Finding the Fourth Proportional to 27,978.42, 41,966.30 and 6,918.39

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Solution

The fourth proportional to 27,978.42, 41,966.30 and 6,918.39 is: 10,377.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,978.42 : 41,966.30 = 6,918.39 : x
  2. Step 2: Convert to fraction form
    27,978.42/41,966.30 = 6,918.39/x
  3. Step 3: Cross multiply
    27,978.42x = 41,966.30 × 6,918.39
  4. Step 4: Simplify right side
    27,978.42x = 290,339,247.55
  5. Step 5: Solve for x
    x = 290,339,247.55/27,978.42
  6. Step 6: Final answer
    x = 10,377.26

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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.