Home / 20,829.06-28,745.69-11,876.77

Finding the Fourth Proportional to 20,829.06, 28,745.69 and 11,876.77

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Solution

The fourth proportional to 20,829.06, 28,745.69 and 11,876.77 is: 16,390.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.06 : 28,745.69 = 11,876.77 : x
  2. Step 2: Convert to fraction form
    20,829.06/28,745.69 = 11,876.77/x
  3. Step 3: Cross multiply
    20,829.06x = 28,745.69 × 11,876.77
  4. Step 4: Simplify right side
    20,829.06x = 341,405,925.17
  5. Step 5: Solve for x
    x = 341,405,925.17/20,829.06
  6. Step 6: Final answer
    x = 16,390.85

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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.