Home / 18,930.60-28,372.14-11,120.04

Finding the Fourth Proportional to 18,930.60, 28,372.14 and 11,120.04

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Solution

The fourth proportional to 18,930.60, 28,372.14 and 11,120.04 is: 16,666.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930.60 : 28,372.14 = 11,120.04 : x
  2. Step 2: Convert to fraction form
    18,930.60/28,372.14 = 11,120.04/x
  3. Step 3: Cross multiply
    18,930.60x = 28,372.14 × 11,120.04
  4. Step 4: Simplify right side
    18,930.60x = 315,499,331.69
  5. Step 5: Solve for x
    x = 315,499,331.69/18,930.60
  6. Step 6: Final answer
    x = 16,666.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.