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Finding the Fourth Proportional to 8,658.63, 12,987.93 and 2,736.12

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Solution

The fourth proportional to 8,658.63, 12,987.93 and 2,736.12 is: 4,104.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.63 : 12,987.93 = 2,736.12 : x
  2. Step 2: Convert to fraction form
    8,658.63/12,987.93 = 2,736.12/x
  3. Step 3: Cross multiply
    8,658.63x = 12,987.93 × 2,736.12
  4. Step 4: Simplify right side
    8,658.63x = 35,536,535.03
  5. Step 5: Solve for x
    x = 35,536,535.03/8,658.63
  6. Step 6: Final answer
    x = 4,104.18

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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.