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Finding the Fourth Proportional to 21,960.28, 32,947.74 and 7,169.80

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Solution

The fourth proportional to 21,960.28, 32,947.74 and 7,169.80 is: 10,757.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,960.28 : 32,947.74 = 7,169.80 : x
  2. Step 2: Convert to fraction form
    21,960.28/32,947.74 = 7,169.80/x
  3. Step 3: Cross multiply
    21,960.28x = 32,947.74 × 7,169.80
  4. Step 4: Simplify right side
    21,960.28x = 236,228,706.25
  5. Step 5: Solve for x
    x = 236,228,706.25/21,960.28
  6. Step 6: Final answer
    x = 10,757.09

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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.