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Finding the Fourth Proportional to 8,261.64, 12,394.41 and 2,715

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Solution

The fourth proportional to 8,261.64, 12,394.41 and 2,715 is: 4,073.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,261.64 : 12,394.41 = 2,715 : x
  2. Step 2: Convert to fraction form
    8,261.64/12,394.41 = 2,715/x
  3. Step 3: Cross multiply
    8,261.64x = 12,394.41 × 2,715
  4. Step 4: Simplify right side
    8,261.64x = 33,650,823.15
  5. Step 5: Solve for x
    x = 33,650,823.15/8,261.64
  6. Step 6: Final answer
    x = 4,073.14

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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.