Home / 21,286.88-31,930.30-10,039.60

Finding the Fourth Proportional to 21,286.88, 31,930.30 and 10,039.60

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Solution

The fourth proportional to 21,286.88, 31,930.30 and 10,039.60 is: 15,059.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.88 : 31,930.30 = 10,039.60 : x
  2. Step 2: Convert to fraction form
    21,286.88/31,930.30 = 10,039.60/x
  3. Step 3: Cross multiply
    21,286.88x = 31,930.30 × 10,039.60
  4. Step 4: Simplify right side
    21,286.88x = 320,567,230.03
  5. Step 5: Solve for x
    x = 320,567,230.03/21,286.88
  6. Step 6: Final answer
    x = 15,059.38

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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.