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Finding the Fourth Proportional to 21,989.44, 32,984.28 and 7,198.24

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Solution

The fourth proportional to 21,989.44, 32,984.28 and 7,198.24 is: 10,797.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,989.44 : 32,984.28 = 7,198.24 : x
  2. Step 2: Convert to fraction form
    21,989.44/32,984.28 = 7,198.24/x
  3. Step 3: Cross multiply
    21,989.44x = 32,984.28 × 7,198.24
  4. Step 4: Simplify right side
    21,989.44x = 237,428,763.67
  5. Step 5: Solve for x
    x = 237,428,763.67/21,989.44
  6. Step 6: Final answer
    x = 10,797.40

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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.