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Finding the Fourth Proportional to 7,659.96, 11,489.94 and 2,187.96

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Solution

The fourth proportional to 7,659.96, 11,489.94 and 2,187.96 is: 3,281.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,659.96 : 11,489.94 = 2,187.96 : x
  2. Step 2: Convert to fraction form
    7,659.96/11,489.94 = 2,187.96/x
  3. Step 3: Cross multiply
    7,659.96x = 11,489.94 × 2,187.96
  4. Step 4: Simplify right side
    7,659.96x = 25,139,529.12
  5. Step 5: Solve for x
    x = 25,139,529.12/7,659.96
  6. Step 6: Final answer
    x = 3,281.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.