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Finding the Fourth Proportional to 8,191.88, 12,288.46 and 2,928.03

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Solution

The fourth proportional to 8,191.88, 12,288.46 and 2,928.03 is: 4,392.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,191.88 : 12,288.46 = 2,928.03 : x
  2. Step 2: Convert to fraction form
    8,191.88/12,288.46 = 2,928.03/x
  3. Step 3: Cross multiply
    8,191.88x = 12,288.46 × 2,928.03
  4. Step 4: Simplify right side
    8,191.88x = 35,980,979.53
  5. Step 5: Solve for x
    x = 35,980,979.53/8,191.88
  6. Step 6: Final answer
    x = 4,392.27

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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.