Home / 20,829.89-28,745.20-11,269.74

Finding the Fourth Proportional to 20,829.89, 28,745.20 and 11,269.74

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Solution

The fourth proportional to 20,829.89, 28,745.20 and 11,269.74 is: 15,552.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.89 : 28,745.20 = 11,269.74 : x
  2. Step 2: Convert to fraction form
    20,829.89/28,745.20 = 11,269.74/x
  3. Step 3: Cross multiply
    20,829.89x = 28,745.20 × 11,269.74
  4. Step 4: Simplify right side
    20,829.89x = 323,950,930.25
  5. Step 5: Solve for x
    x = 323,950,930.25/20,829.89
  6. Step 6: Final answer
    x = 15,552.22

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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.