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Finding the Fourth Proportional to 21,947.20, 32,872.20 and 18,059.20

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Solution

The fourth proportional to 21,947.20, 32,872.20 and 18,059.20 is: 27,048.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,947.20 : 32,872.20 = 18,059.20 : x
  2. Step 2: Convert to fraction form
    21,947.20/32,872.20 = 18,059.20/x
  3. Step 3: Cross multiply
    21,947.20x = 32,872.20 × 18,059.20
  4. Step 4: Simplify right side
    21,947.20x = 593,645,634.24
  5. Step 5: Solve for x
    x = 593,645,634.24/21,947.20
  6. Step 6: Final answer
    x = 27,048.81

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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.