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Finding the Fourth Proportional to 8,608.12, 11,860.14 and 7,186.84

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Solution

The fourth proportional to 8,608.12, 11,860.14 and 7,186.84 is: 9,901.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,608.12 : 11,860.14 = 7,186.84 : x
  2. Step 2: Convert to fraction form
    8,608.12/11,860.14 = 7,186.84/x
  3. Step 3: Cross multiply
    8,608.12x = 11,860.14 × 7,186.84
  4. Step 4: Simplify right side
    8,608.12x = 85,236,928.56
  5. Step 5: Solve for x
    x = 85,236,928.56/8,608.12
  6. Step 6: Final answer
    x = 9,901.92

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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.