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Finding the Fourth Proportional to 17,991.88, 26,991.06 and 8,623.96

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Solution

The fourth proportional to 17,991.88, 26,991.06 and 8,623.96 is: 12,937.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,991.88 : 26,991.06 = 8,623.96 : x
  2. Step 2: Convert to fraction form
    17,991.88/26,991.06 = 8,623.96/x
  3. Step 3: Cross multiply
    17,991.88x = 26,991.06 × 8,623.96
  4. Step 4: Simplify right side
    17,991.88x = 232,769,821.80
  5. Step 5: Solve for x
    x = 232,769,821.80/17,991.88
  6. Step 6: Final answer
    x = 12,937.49

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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.