Home / 21,850.70-30,153.99-12,419.25

Finding the Fourth Proportional to 21,850.70, 30,153.99 and 12,419.25

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Solution

The fourth proportional to 21,850.70, 30,153.99 and 12,419.25 is: 17,138.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,850.70 : 30,153.99 = 12,419.25 : x
  2. Step 2: Convert to fraction form
    21,850.70/30,153.99 = 12,419.25/x
  3. Step 3: Cross multiply
    21,850.70x = 30,153.99 × 12,419.25
  4. Step 4: Simplify right side
    21,850.70x = 374,489,940.31
  5. Step 5: Solve for x
    x = 374,489,940.31/21,850.70
  6. Step 6: Final answer
    x = 17,138.58

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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.