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Finding the Fourth Proportional to 21,951.52, 32,928.39 and 12,589.03

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Solution

The fourth proportional to 21,951.52, 32,928.39 and 12,589.03 is: 18,884.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,951.52 : 32,928.39 = 12,589.03 : x
  2. Step 2: Convert to fraction form
    21,951.52/32,928.39 = 12,589.03/x
  3. Step 3: Cross multiply
    21,951.52x = 32,928.39 × 12,589.03
  4. Step 4: Simplify right side
    21,951.52x = 414,536,489.56
  5. Step 5: Solve for x
    x = 414,536,489.56/21,951.52
  6. Step 6: Final answer
    x = 18,884.18

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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.