Home / 20,885.22-28,821.09-11,324.58

Finding the Fourth Proportional to 20,885.22, 28,821.09 and 11,324.58

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Solution

The fourth proportional to 20,885.22, 28,821.09 and 11,324.58 is: 15,627.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.22 : 28,821.09 = 11,324.58 : x
  2. Step 2: Convert to fraction form
    20,885.22/28,821.09 = 11,324.58/x
  3. Step 3: Cross multiply
    20,885.22x = 28,821.09 × 11,324.58
  4. Step 4: Simplify right side
    20,885.22x = 326,386,739.39
  5. Step 5: Solve for x
    x = 326,386,739.39/20,885.22
  6. Step 6: Final answer
    x = 15,627.64

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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.