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Finding the Fourth Proportional to 17,978.08, 26,979.26 and 6,291.40

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Solution

The fourth proportional to 17,978.08, 26,979.26 and 6,291.40 is: 9,441.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,978.08 : 26,979.26 = 6,291.40 : x
  2. Step 2: Convert to fraction form
    17,978.08/26,979.26 = 6,291.40/x
  3. Step 3: Cross multiply
    17,978.08x = 26,979.26 × 6,291.40
  4. Step 4: Simplify right side
    17,978.08x = 169,737,316.36
  5. Step 5: Solve for x
    x = 169,737,316.36/17,978.08
  6. Step 6: Final answer
    x = 9,441.35

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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.