Home / 20,817.54-28,734.21-11,869.92

Finding the Fourth Proportional to 20,817.54, 28,734.21 and 11,869.92

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Solution

The fourth proportional to 20,817.54, 28,734.21 and 11,869.92 is: 16,383.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.54 : 28,734.21 = 11,869.92 : x
  2. Step 2: Convert to fraction form
    20,817.54/28,734.21 = 11,869.92/x
  3. Step 3: Cross multiply
    20,817.54x = 28,734.21 × 11,869.92
  4. Step 4: Simplify right side
    20,817.54x = 341,072,773.96
  5. Step 5: Solve for x
    x = 341,072,773.96/20,817.54
  6. Step 6: Final answer
    x = 16,383.91

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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.