Home / 20,823.89-28,737.72-11,869.94

Finding the Fourth Proportional to 20,823.89, 28,737.72 and 11,869.94

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Solution

The fourth proportional to 20,823.89, 28,737.72 and 11,869.94 is: 16,380.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.89 : 28,737.72 = 11,869.94 : x
  2. Step 2: Convert to fraction form
    20,823.89/28,737.72 = 11,869.94/x
  3. Step 3: Cross multiply
    20,823.89x = 28,737.72 × 11,869.94
  4. Step 4: Simplify right side
    20,823.89x = 341,115,083.98
  5. Step 5: Solve for x
    x = 341,115,083.98/20,823.89
  6. Step 6: Final answer
    x = 16,380.95

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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.