Home / 20,383.92-28,123.11-11,884.10

Finding the Fourth Proportional to 20,383.92, 28,123.11 and 11,884.10

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Solution

The fourth proportional to 20,383.92, 28,123.11 and 11,884.10 is: 16,396.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.92 : 28,123.11 = 11,884.10 : x
  2. Step 2: Convert to fraction form
    20,383.92/28,123.11 = 11,884.10/x
  3. Step 3: Cross multiply
    20,383.92x = 28,123.11 × 11,884.10
  4. Step 4: Simplify right side
    20,383.92x = 334,217,710.94
  5. Step 5: Solve for x
    x = 334,217,710.94/20,383.92
  6. Step 6: Final answer
    x = 16,396.15

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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.