Home / 21,921.26-30,251.32-12,489.82

Finding the Fourth Proportional to 21,921.26, 30,251.32 and 12,489.82

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Solution

The fourth proportional to 21,921.26, 30,251.32 and 12,489.82 is: 17,235.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,921.26 : 30,251.32 = 12,489.82 : x
  2. Step 2: Convert to fraction form
    21,921.26/30,251.32 = 12,489.82/x
  3. Step 3: Cross multiply
    21,921.26x = 30,251.32 × 12,489.82
  4. Step 4: Simplify right side
    21,921.26x = 377,833,541.56
  5. Step 5: Solve for x
    x = 377,833,541.56/21,921.26
  6. Step 6: Final answer
    x = 17,235.94

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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.