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Finding the Fourth Proportional to 8,262, 12,394.96 and 2,790

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Solution

The fourth proportional to 8,262, 12,394.96 and 2,790 is: 4,185.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,262 : 12,394.96 = 2,790 : x
  2. Step 2: Convert to fraction form
    8,262/12,394.96 = 2,790/x
  3. Step 3: Cross multiply
    8,262x = 12,394.96 × 2,790
  4. Step 4: Simplify right side
    8,262x = 34,581,938.40
  5. Step 5: Solve for x
    x = 34,581,938.40/8,262
  6. Step 6: Final answer
    x = 4,185.66

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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.