Home / 18,930.11-28,171.70-18,299.42

Finding the Fourth Proportional to 18,930.11, 28,171.70 and 18,299.42

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Solution

The fourth proportional to 18,930.11, 28,171.70 and 18,299.42 is: 27,233.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930.11 : 28,171.70 = 18,299.42 : x
  2. Step 2: Convert to fraction form
    18,930.11/28,171.70 = 18,299.42/x
  3. Step 3: Cross multiply
    18,930.11x = 28,171.70 × 18,299.42
  4. Step 4: Simplify right side
    18,930.11x = 515,525,712.33
  5. Step 5: Solve for x
    x = 515,525,712.33/18,930.11
  6. Step 6: Final answer
    x = 27,233.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.