Home / 21,021.68-31,530.56-12,251.12

Finding the Fourth Proportional to 21,021.68, 31,530.56 and 12,251.12

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Solution

The fourth proportional to 21,021.68, 31,530.56 and 12,251.12 is: 18,375.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.68 : 31,530.56 = 12,251.12 : x
  2. Step 2: Convert to fraction form
    21,021.68/31,530.56 = 12,251.12/x
  3. Step 3: Cross multiply
    21,021.68x = 31,530.56 × 12,251.12
  4. Step 4: Simplify right side
    21,021.68x = 386,284,674.23
  5. Step 5: Solve for x
    x = 386,284,674.23/21,021.68
  6. Step 6: Final answer
    x = 18,375.54

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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.