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Finding the Fourth Proportional to 17,978.54, 26,979.96 and 6,291.86

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Solution

The fourth proportional to 17,978.54, 26,979.96 and 6,291.86 is: 9,442.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,978.54 : 26,979.96 = 6,291.86 : x
  2. Step 2: Convert to fraction form
    17,978.54/26,979.96 = 6,291.86/x
  3. Step 3: Cross multiply
    17,978.54x = 26,979.96 × 6,291.86
  4. Step 4: Simplify right side
    17,978.54x = 169,754,131.13
  5. Step 5: Solve for x
    x = 169,754,131.13/17,978.54
  6. Step 6: Final answer
    x = 9,442.04

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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.