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Finding the Fourth Proportional to 13,015,978.56, 17,962,231.20 and 7,136,165.44

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Solution

The fourth proportional to 13,015,978.56, 17,962,231.20 and 7,136,165.44 is: 9,848,007.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,015,978.56 : 17,962,231.20 = 7,136,165.44 : x
  2. Step 2: Convert to fraction form
    13,015,978.56/17,962,231.20 = 7,136,165.44/x
  3. Step 3: Cross multiply
    13,015,978.56x = 17,962,231.20 × 7,136,165.44
  4. Step 4: Simplify right side
    13,015,978.56x = 128,181,453,514,729.73
  5. Step 5: Solve for x
    x = 128,181,453,514,729.73/13,015,978.56
  6. Step 6: Final answer
    x = 9,848,007.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.