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Finding the Fourth Proportional to 8,640.69, 12,958.34 and 2,796.09

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Solution

The fourth proportional to 8,640.69, 12,958.34 and 2,796.09 is: 4,193.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.69 : 12,958.34 = 2,796.09 : x
  2. Step 2: Convert to fraction form
    8,640.69/12,958.34 = 2,796.09/x
  3. Step 3: Cross multiply
    8,640.69x = 12,958.34 × 2,796.09
  4. Step 4: Simplify right side
    8,640.69x = 36,232,670.91
  5. Step 5: Solve for x
    x = 36,232,670.91/8,640.69
  6. Step 6: Final answer
    x = 4,193.26

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1.5x scale

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.