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Finding the Fourth Proportional to 8,674.88, 11,965.92 and 5,690.88

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Solution

The fourth proportional to 8,674.88, 11,965.92 and 5,690.88 is: 7,849.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,674.88 : 11,965.92 = 5,690.88 : x
  2. Step 2: Convert to fraction form
    8,674.88/11,965.92 = 5,690.88/x
  3. Step 3: Cross multiply
    8,674.88x = 11,965.92 × 5,690.88
  4. Step 4: Simplify right side
    8,674.88x = 68,096,614.81
  5. Step 5: Solve for x
    x = 68,096,614.81/8,674.88
  6. Step 6: Final answer
    x = 7,849.86

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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.