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Finding the Fourth Proportional to 11,978,015.40, 17,967,023.10 and 9,143,663.40

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Solution

The fourth proportional to 11,978,015.40, 17,967,023.10 and 9,143,663.40 is: 13,715,495.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,978,015.40 : 17,967,023.10 = 9,143,663.40 : x
  2. Step 2: Convert to fraction form
    11,978,015.40/17,967,023.10 = 9,143,663.40/x
  3. Step 3: Cross multiply
    11,978,015.40x = 17,967,023.10 × 9,143,663.40
  4. Step 4: Simplify right side
    11,978,015.40x = 164,284,411,526,424.56
  5. Step 5: Solve for x
    x = 164,284,411,526,424.56/11,978,015.40
  6. Step 6: Final answer
    x = 13,715,495.10

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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.