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Finding the Fourth Proportional to 8,486.31, 12,699.36 and 6,259.87

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Solution

The fourth proportional to 8,486.31, 12,699.36 and 6,259.87 is: 9,367.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486.31 : 12,699.36 = 6,259.87 : x
  2. Step 2: Convert to fraction form
    8,486.31/12,699.36 = 6,259.87/x
  3. Step 3: Cross multiply
    8,486.31x = 12,699.36 × 6,259.87
  4. Step 4: Simplify right side
    8,486.31x = 79,496,342.68
  5. Step 5: Solve for x
    x = 79,496,342.68/8,486.31
  6. Step 6: Final answer
    x = 9,367.60

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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.