Home / 20,885.25-28,821.66-11,453.85

Finding the Fourth Proportional to 20,885.25, 28,821.66 and 11,453.85

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Solution

The fourth proportional to 20,885.25, 28,821.66 and 11,453.85 is: 15,806.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.25 : 28,821.66 = 11,453.85 : x
  2. Step 2: Convert to fraction form
    20,885.25/28,821.66 = 11,453.85/x
  3. Step 3: Cross multiply
    20,885.25x = 28,821.66 × 11,453.85
  4. Step 4: Simplify right side
    20,885.25x = 330,118,970.39
  5. Step 5: Solve for x
    x = 330,118,970.39/20,885.25
  6. Step 6: Final answer
    x = 15,806.32

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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.