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Finding the Fourth Proportional to 8,692.39, 11,979.43 and 6,174.60

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Solution

The fourth proportional to 8,692.39, 11,979.43 and 6,174.60 is: 8,509.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,692.39 : 11,979.43 = 6,174.60 : x
  2. Step 2: Convert to fraction form
    8,692.39/11,979.43 = 6,174.60/x
  3. Step 3: Cross multiply
    8,692.39x = 11,979.43 × 6,174.60
  4. Step 4: Simplify right side
    8,692.39x = 73,968,188.48
  5. Step 5: Solve for x
    x = 73,968,188.48/8,692.39
  6. Step 6: Final answer
    x = 8,509.53

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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.