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Finding the Fourth Proportional to 10,659,231.20, 15,978,349.20 and 5,268,713.60

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Solution

The fourth proportional to 10,659,231.20, 15,978,349.20 and 5,268,713.60 is: 7,897,881.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,659,231.20 : 15,978,349.20 = 5,268,713.60 : x
  2. Step 2: Convert to fraction form
    10,659,231.20/15,978,349.20 = 5,268,713.60/x
  3. Step 3: Cross multiply
    10,659,231.20x = 15,978,349.20 × 5,268,713.60
  4. Step 4: Simplify right side
    10,659,231.20x = 84,185,345,735,589.11
  5. Step 5: Solve for x
    x = 84,185,345,735,589.11/10,659,231.20
  6. Step 6: Final answer
    x = 7,897,881.58

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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.