Home / 20,845.50-28,766.90-11,892.92

Finding the Fourth Proportional to 20,845.50, 28,766.90 and 11,892.92

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Solution

The fourth proportional to 20,845.50, 28,766.90 and 11,892.92 is: 16,412.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.50 : 28,766.90 = 11,892.92 : x
  2. Step 2: Convert to fraction form
    20,845.50/28,766.90 = 11,892.92/x
  3. Step 3: Cross multiply
    20,845.50x = 28,766.90 × 11,892.92
  4. Step 4: Simplify right side
    20,845.50x = 342,122,237.05
  5. Step 5: Solve for x
    x = 342,122,237.05/20,845.50
  6. Step 6: Final answer
    x = 16,412.28

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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.