Home / 21,189.68-29,241.96-11,759.12

Finding the Fourth Proportional to 21,189.68, 29,241.96 and 11,759.12

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Solution

The fourth proportional to 21,189.68, 29,241.96 and 11,759.12 is: 16,227.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.68 : 29,241.96 = 11,759.12 : x
  2. Step 2: Convert to fraction form
    21,189.68/29,241.96 = 11,759.12/x
  3. Step 3: Cross multiply
    21,189.68x = 29,241.96 × 11,759.12
  4. Step 4: Simplify right side
    21,189.68x = 343,859,716.68
  5. Step 5: Solve for x
    x = 343,859,716.68/21,189.68
  6. Step 6: Final answer
    x = 16,227.70

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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.