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Finding the Fourth Proportional to 17,978,393.53, 26,986,781.20 and 7,748,301.90

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Solution

The fourth proportional to 17,978,393.53, 26,986,781.20 and 7,748,301.90 is: 11,630,723.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,978,393.53 : 26,986,781.20 = 7,748,301.90 : x
  2. Step 2: Convert to fraction form
    17,978,393.53/26,986,781.20 = 7,748,301.90/x
  3. Step 3: Cross multiply
    17,978,393.53x = 26,986,781.20 × 7,748,301.90
  4. Step 4: Simplify right side
    17,978,393.53x = 209,101,728,046,844.28
  5. Step 5: Solve for x
    x = 209,101,728,046,844.28/17,978,393.53
  6. Step 6: Final answer
    x = 11,630,723.72

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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.