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Finding the Fourth Proportional to 8,469.88, 11,688.84 and 5,112.62

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Solution

The fourth proportional to 8,469.88, 11,688.84 and 5,112.62 is: 7,055.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,469.88 : 11,688.84 = 5,112.62 : x
  2. Step 2: Convert to fraction form
    8,469.88/11,688.84 = 5,112.62/x
  3. Step 3: Cross multiply
    8,469.88x = 11,688.84 × 5,112.62
  4. Step 4: Simplify right side
    8,469.88x = 59,760,597.16
  5. Step 5: Solve for x
    x = 59,760,597.16/8,469.88
  6. Step 6: Final answer
    x = 7,055.66

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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.