Home / 21,331.12-29,436.72-11,902

Finding the Fourth Proportional to 21,331.12, 29,436.72 and 11,902

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Solution

The fourth proportional to 21,331.12, 29,436.72 and 11,902 is: 16,424.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.12 : 29,436.72 = 11,902 : x
  2. Step 2: Convert to fraction form
    21,331.12/29,436.72 = 11,902/x
  3. Step 3: Cross multiply
    21,331.12x = 29,436.72 × 11,902
  4. Step 4: Simplify right side
    21,331.12x = 350,355,841.44
  5. Step 5: Solve for x
    x = 350,355,841.44/21,331.12
  6. Step 6: Final answer
    x = 16,424.63

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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.