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Finding the Fourth Proportional to 17,978.04, 26,979.21 and 6,291.36

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Solution

The fourth proportional to 17,978.04, 26,979.21 and 6,291.36 is: 9,441.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,978.04 : 26,979.21 = 6,291.36 : x
  2. Step 2: Convert to fraction form
    17,978.04/26,979.21 = 6,291.36/x
  3. Step 3: Cross multiply
    17,978.04x = 26,979.21 × 6,291.36
  4. Step 4: Simplify right side
    17,978.04x = 169,735,906.90
  5. Step 5: Solve for x
    x = 169,735,906.90/17,978.04
  6. Step 6: Final answer
    x = 9,441.29

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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.