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Finding the Fourth Proportional to 21,959.97, 32,939.97 and 5,320.02

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Solution

The fourth proportional to 21,959.97, 32,939.97 and 5,320.02 is: 7,980.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,959.97 : 32,939.97 = 5,320.02 : x
  2. Step 2: Convert to fraction form
    21,959.97/32,939.97 = 5,320.02/x
  3. Step 3: Cross multiply
    21,959.97x = 32,939.97 × 5,320.02
  4. Step 4: Simplify right side
    21,959.97x = 175,241,299.20
  5. Step 5: Solve for x
    x = 175,241,299.20/21,959.97
  6. Step 6: Final answer
    x = 7,980.03

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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.