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Finding the Fourth Proportional to 7,987,968.10, 11,978,999.70 and 2,596,794.40

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Solution

The fourth proportional to 7,987,968.10, 11,978,999.70 and 2,596,794.40 is: 3,894,231.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,987,968.10 : 11,978,999.70 = 2,596,794.40 : x
  2. Step 2: Convert to fraction form
    7,987,968.10/11,978,999.70 = 2,596,794.40/x
  3. Step 3: Cross multiply
    7,987,968.10x = 11,978,999.70 × 2,596,794.40
  4. Step 4: Simplify right side
    7,987,968.10x = 31,106,999,338,561.68
  5. Step 5: Solve for x
    x = 31,106,999,338,561.68/7,987,968.10
  6. Step 6: Final answer
    x = 3,894,231.79

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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.