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Finding the Fourth Proportional to 8,675.30, 11,961.78 and 8,208.20

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Solution

The fourth proportional to 8,675.30, 11,961.78 and 8,208.20 is: 11,317.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,675.30 : 11,961.78 = 8,208.20 : x
  2. Step 2: Convert to fraction form
    8,675.30/11,961.78 = 8,208.20/x
  3. Step 3: Cross multiply
    8,675.30x = 11,961.78 × 8,208.20
  4. Step 4: Simplify right side
    8,675.30x = 98,184,682.60
  5. Step 5: Solve for x
    x = 98,184,682.60/8,675.30
  6. Step 6: Final answer
    x = 11,317.73

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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.