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Finding the Fourth Proportional to 11,988,435.16, 17,978,188.53 and 4,309,984.78

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Solution

The fourth proportional to 11,988,435.16, 17,978,188.53 and 4,309,984.78 is: 6,463,372.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,988,435.16 : 17,978,188.53 = 4,309,984.78 : x
  2. Step 2: Convert to fraction form
    11,988,435.16/17,978,188.53 = 4,309,984.78/x
  3. Step 3: Cross multiply
    11,988,435.16x = 17,978,188.53 × 4,309,984.78
  4. Step 4: Simplify right side
    11,988,435.16x = 77,485,718,824,829.70
  5. Step 5: Solve for x
    x = 77,485,718,824,829.70/11,988,435.16
  6. Step 6: Final answer
    x = 6,463,372.22

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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.