Home / 7,419.49-11,129.82-2,489.12

Finding the Fourth Proportional to 7,419.49, 11,129.82 and 2,489.12

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Solution

The fourth proportional to 7,419.49, 11,129.82 and 2,489.12 is: 3,733.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,419.49 : 11,129.82 = 2,489.12 : x
  2. Step 2: Convert to fraction form
    7,419.49/11,129.82 = 2,489.12/x
  3. Step 3: Cross multiply
    7,419.49x = 11,129.82 × 2,489.12
  4. Step 4: Simplify right side
    7,419.49x = 27,703,457.56
  5. Step 5: Solve for x
    x = 27,703,457.56/7,419.49
  6. Step 6: Final answer
    x = 3,733.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.