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Finding the Fourth Proportional to 8,425.64, 12,638.45 and 2,581.49

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Solution

The fourth proportional to 8,425.64, 12,638.45 and 2,581.49 is: 3,872.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,425.64 : 12,638.45 = 2,581.49 : x
  2. Step 2: Convert to fraction form
    8,425.64/12,638.45 = 2,581.49/x
  3. Step 3: Cross multiply
    8,425.64x = 12,638.45 × 2,581.49
  4. Step 4: Simplify right side
    8,425.64x = 32,625,969.10
  5. Step 5: Solve for x
    x = 32,625,969.10/8,425.64
  6. Step 6: Final answer
    x = 3,872.23

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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.