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Finding the Fourth Proportional to 15,889.75, 21,926.97 and 9,174.96

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Solution

The fourth proportional to 15,889.75, 21,926.97 and 9,174.96 is: 12,660.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,889.75 : 21,926.97 = 9,174.96 : x
  2. Step 2: Convert to fraction form
    15,889.75/21,926.97 = 9,174.96/x
  3. Step 3: Cross multiply
    15,889.75x = 21,926.97 × 9,174.96
  4. Step 4: Simplify right side
    15,889.75x = 201,179,072.67
  5. Step 5: Solve for x
    x = 201,179,072.67/15,889.75
  6. Step 6: Final answer
    x = 12,660.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.