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Finding the Fourth Proportional to 7,978,160.35, 11,965,060.81 and 2,859,636.21

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Solution

The fourth proportional to 7,978,160.35, 11,965,060.81 and 2,859,636.21 is: 4,288,673.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,978,160.35 : 11,965,060.81 = 2,859,636.21 : x
  2. Step 2: Convert to fraction form
    7,978,160.35/11,965,060.81 = 2,859,636.21/x
  3. Step 3: Cross multiply
    7,978,160.35x = 11,965,060.81 × 2,859,636.21
  4. Step 4: Simplify right side
    7,978,160.35x = 34,215,721,147,127.93
  5. Step 5: Solve for x
    x = 34,215,721,147,127.93/7,978,160.35
  6. Step 6: Final answer
    x = 4,288,673.03

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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.