Home / 21,824.40-30,120.12-12,394.56

Finding the Fourth Proportional to 21,824.40, 30,120.12 and 12,394.56

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Solution

The fourth proportional to 21,824.40, 30,120.12 and 12,394.56 is: 17,105.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,824.40 : 30,120.12 = 12,394.56 : x
  2. Step 2: Convert to fraction form
    21,824.40/30,120.12 = 12,394.56/x
  3. Step 3: Cross multiply
    21,824.40x = 30,120.12 × 12,394.56
  4. Step 4: Simplify right side
    21,824.40x = 373,325,634.55
  5. Step 5: Solve for x
    x = 373,325,634.55/21,824.40
  6. Step 6: Final answer
    x = 17,105.88

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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.