Home / 20,930.80-28,885.90-11,499.44

Finding the Fourth Proportional to 20,930.80, 28,885.90 and 11,499.44

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Solution

The fourth proportional to 20,930.80, 28,885.90 and 11,499.44 is: 15,869.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.80 : 28,885.90 = 11,499.44 : x
  2. Step 2: Convert to fraction form
    20,930.80/28,885.90 = 11,499.44/x
  3. Step 3: Cross multiply
    20,930.80x = 28,885.90 × 11,499.44
  4. Step 4: Simplify right side
    20,930.80x = 332,171,673.90
  5. Step 5: Solve for x
    x = 332,171,673.90/20,930.80
  6. Step 6: Final answer
    x = 15,869.99

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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.