Home / 20,928.13-28,879.33-11,850.90

Finding the Fourth Proportional to 20,928.13, 28,879.33 and 11,850.90

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Solution

The fourth proportional to 20,928.13, 28,879.33 and 11,850.90 is: 16,353.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.13 : 28,879.33 = 11,850.90 : x
  2. Step 2: Convert to fraction form
    20,928.13/28,879.33 = 11,850.90/x
  3. Step 3: Cross multiply
    20,928.13x = 28,879.33 × 11,850.90
  4. Step 4: Simplify right side
    20,928.13x = 342,246,051.90
  5. Step 5: Solve for x
    x = 342,246,051.90/20,928.13
  6. Step 6: Final answer
    x = 16,353.40

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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.