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Finding the Fourth Proportional to 21,963.20, 32,944.88 and 5,323.20

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Solution

The fourth proportional to 21,963.20, 32,944.88 and 5,323.20 is: 7,984.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,963.20 : 32,944.88 = 5,323.20 : x
  2. Step 2: Convert to fraction form
    21,963.20/32,944.88 = 5,323.20/x
  3. Step 3: Cross multiply
    21,963.20x = 32,944.88 × 5,323.20
  4. Step 4: Simplify right side
    21,963.20x = 175,372,185.22
  5. Step 5: Solve for x
    x = 175,372,185.22/21,963.20
  6. Step 6: Final answer
    x = 7,984.82

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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.