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Finding the Fourth Proportional to 17,978,380.26, 26,986,761.36 and 7,748,288.64

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Solution

The fourth proportional to 17,978,380.26, 26,986,761.36 and 7,748,288.64 is: 11,630,703.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,978,380.26 : 26,986,761.36 = 7,748,288.64 : x
  2. Step 2: Convert to fraction form
    17,978,380.26/26,986,761.36 = 7,748,288.64/x
  3. Step 3: Cross multiply
    17,978,380.26x = 26,986,761.36 × 7,748,288.64
  4. Step 4: Simplify right side
    17,978,380.26x = 209,101,216,476,078.94
  5. Step 5: Solve for x
    x = 209,101,216,476,078.94/17,978,380.26
  6. Step 6: Final answer
    x = 11,630,703.85

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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.