Home / 21,338.13-29,446.62-11,906.70

Finding the Fourth Proportional to 21,338.13, 29,446.62 and 11,906.70

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Solution

The fourth proportional to 21,338.13, 29,446.62 and 11,906.70 is: 16,431.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,338.13 : 29,446.62 = 11,906.70 : x
  2. Step 2: Convert to fraction form
    21,338.13/29,446.62 = 11,906.70/x
  3. Step 3: Cross multiply
    21,338.13x = 29,446.62 × 11,906.70
  4. Step 4: Simplify right side
    21,338.13x = 350,612,070.35
  5. Step 5: Solve for x
    x = 350,612,070.35/21,338.13
  6. Step 6: Final answer
    x = 16,431.25

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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.