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Finding the Fourth Proportional to 17,977.38, 26,978.22 and 6,290.70

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Solution

The fourth proportional to 17,977.38, 26,978.22 and 6,290.70 is: 9,440.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,977.38 : 26,978.22 = 6,290.70 : x
  2. Step 2: Convert to fraction form
    17,977.38/26,978.22 = 6,290.70/x
  3. Step 3: Cross multiply
    17,977.38x = 26,978.22 × 6,290.70
  4. Step 4: Simplify right side
    17,977.38x = 169,711,979.59
  5. Step 5: Solve for x
    x = 169,711,979.59/17,977.38
  6. Step 6: Final answer
    x = 9,440.31

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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.