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Finding the Fourth Proportional to 17,861.22, 26,780.01 and 7,986.90

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Solution

The fourth proportional to 17,861.22, 26,780.01 and 7,986.90 is: 11,975.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,861.22 : 26,780.01 = 7,986.90 : x
  2. Step 2: Convert to fraction form
    17,861.22/26,780.01 = 7,986.90/x
  3. Step 3: Cross multiply
    17,861.22x = 26,780.01 × 7,986.90
  4. Step 4: Simplify right side
    17,861.22x = 213,889,261.87
  5. Step 5: Solve for x
    x = 213,889,261.87/17,861.22
  6. Step 6: Final answer
    x = 11,975.06

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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.