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Finding the Fourth Proportional to 20,898.44, 28,811.40 and 14,919.73

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Solution

The fourth proportional to 20,898.44, 28,811.40 and 14,919.73 is: 20,568.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,898.44 : 28,811.40 = 14,919.73 : x
  2. Step 2: Convert to fraction form
    20,898.44/28,811.40 = 14,919.73/x
  3. Step 3: Cross multiply
    20,898.44x = 28,811.40 × 14,919.73
  4. Step 4: Simplify right side
    20,898.44x = 429,858,180.94
  5. Step 5: Solve for x
    x = 429,858,180.94/20,898.44
  6. Step 6: Final answer
    x = 20,568.91

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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.