Home / 21,850.24-30,153.42-12,421.84

Finding the Fourth Proportional to 21,850.24, 30,153.42 and 12,421.84

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Solution

The fourth proportional to 21,850.24, 30,153.42 and 12,421.84 is: 17,142.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,850.24 : 30,153.42 = 12,421.84 : x
  2. Step 2: Convert to fraction form
    21,850.24/30,153.42 = 12,421.84/x
  3. Step 3: Cross multiply
    21,850.24x = 30,153.42 × 12,421.84
  4. Step 4: Simplify right side
    21,850.24x = 374,560,958.69
  5. Step 5: Solve for x
    x = 374,560,958.69/21,850.24
  6. Step 6: Final answer
    x = 17,142.19

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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.