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Finding the Fourth Proportional to 8,536.40, 12,792.60 and 6,784.40

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Solution

The fourth proportional to 8,536.40, 12,792.60 and 6,784.40 is: 10,167.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,536.40 : 12,792.60 = 6,784.40 : x
  2. Step 2: Convert to fraction form
    8,536.40/12,792.60 = 6,784.40/x
  3. Step 3: Cross multiply
    8,536.40x = 12,792.60 × 6,784.40
  4. Step 4: Simplify right side
    8,536.40x = 86,790,115.44
  5. Step 5: Solve for x
    x = 86,790,115.44/8,536.40
  6. Step 6: Final answer
    x = 10,167.06

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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.