Home / 21,102-29,121.68-11,670.57

Finding the Fourth Proportional to 21,102, 29,121.68 and 11,670.57

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Solution

The fourth proportional to 21,102, 29,121.68 and 11,670.57 is: 16,105.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102 : 29,121.68 = 11,670.57 : x
  2. Step 2: Convert to fraction form
    21,102/29,121.68 = 11,670.57/x
  3. Step 3: Cross multiply
    21,102x = 29,121.68 × 11,670.57
  4. Step 4: Simplify right side
    21,102x = 339,866,546.60
  5. Step 5: Solve for x
    x = 339,866,546.60/21,102
  6. Step 6: Final answer
    x = 16,105.89

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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.