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Finding the Fourth Proportional to 6,893.40, 9,513.09 and 3,909.09

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Solution

The fourth proportional to 6,893.40, 9,513.09 and 3,909.09 is: 5,394.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,893.40 : 9,513.09 = 3,909.09 : x
  2. Step 2: Convert to fraction form
    6,893.40/9,513.09 = 3,909.09/x
  3. Step 3: Cross multiply
    6,893.40x = 9,513.09 × 3,909.09
  4. Step 4: Simplify right side
    6,893.40x = 37,187,524.99
  5. Step 5: Solve for x
    x = 37,187,524.99/6,893.40
  6. Step 6: Final answer
    x = 5,394.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.