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Finding the Fourth Proportional to 8,686.76, 11,978.38 and 8,504.48

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Solution

The fourth proportional to 8,686.76, 11,978.38 and 8,504.48 is: 11,727.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,686.76 : 11,978.38 = 8,504.48 : x
  2. Step 2: Convert to fraction form
    8,686.76/11,978.38 = 8,504.48/x
  3. Step 3: Cross multiply
    8,686.76x = 11,978.38 × 8,504.48
  4. Step 4: Simplify right side
    8,686.76x = 101,869,893.14
  5. Step 5: Solve for x
    x = 101,869,893.14/8,686.76
  6. Step 6: Final answer
    x = 11,727.03

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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.