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Finding the Fourth Proportional to 17,978,073.20, 26,967,109.80 and 11,931,455.60

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Solution

The fourth proportional to 17,978,073.20, 26,967,109.80 and 11,931,455.60 is: 17,897,183.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,978,073.20 : 26,967,109.80 = 11,931,455.60 : x
  2. Step 2: Convert to fraction form
    17,978,073.20/26,967,109.80 = 11,931,455.60/x
  3. Step 3: Cross multiply
    17,978,073.20x = 26,967,109.80 × 11,931,455.60
  4. Step 4: Simplify right side
    17,978,073.20x = 321,756,873,239,024.88
  5. Step 5: Solve for x
    x = 321,756,873,239,024.88/17,978,073.20
  6. Step 6: Final answer
    x = 17,897,183.40

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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.