Home / 20,884.86-28,820.97-11,324.79

Finding the Fourth Proportional to 20,884.86, 28,820.97 and 11,324.79

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Solution

The fourth proportional to 20,884.86, 28,820.97 and 11,324.79 is: 15,628.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,884.86 : 28,820.97 = 11,324.79 : x
  2. Step 2: Convert to fraction form
    20,884.86/28,820.97 = 11,324.79/x
  3. Step 3: Cross multiply
    20,884.86x = 28,820.97 × 11,324.79
  4. Step 4: Simplify right side
    20,884.86x = 326,391,432.85
  5. Step 5: Solve for x
    x = 326,391,432.85/20,884.86
  6. Step 6: Final answer
    x = 15,628.14

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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.