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Finding the Fourth Proportional to 8,312,804.21, 11,479,593.15 and 7,859,922.98

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Solution

The fourth proportional to 8,312,804.21, 11,479,593.15 and 7,859,922.98 is: 10,854,185.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,312,804.21 : 11,479,593.15 = 7,859,922.98 : x
  2. Step 2: Convert to fraction form
    8,312,804.21/11,479,593.15 = 7,859,922.98/x
  3. Step 3: Cross multiply
    8,312,804.21x = 11,479,593.15 × 7,859,922.98
  4. Step 4: Simplify right side
    8,312,804.21x = 90,228,718,000,735.59
  5. Step 5: Solve for x
    x = 90,228,718,000,735.59/8,312,804.21
  6. Step 6: Final answer
    x = 10,854,185.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.