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Finding the Fourth Proportional to 17,990.88, 26,989.56 and 8,622.96

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Solution

The fourth proportional to 17,990.88, 26,989.56 and 8,622.96 is: 12,935.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,990.88 : 26,989.56 = 8,622.96 : x
  2. Step 2: Convert to fraction form
    17,990.88/26,989.56 = 8,622.96/x
  3. Step 3: Cross multiply
    17,990.88x = 26,989.56 × 8,622.96
  4. Step 4: Simplify right side
    17,990.88x = 232,729,896.30
  5. Step 5: Solve for x
    x = 232,729,896.30/17,990.88
  6. Step 6: Final answer
    x = 12,935.99

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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.