Home / 18,872.91-28,313.55-6,391.89

Finding the Fourth Proportional to 18,872.91, 28,313.55 and 6,391.89

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Solution

The fourth proportional to 18,872.91, 28,313.55 and 6,391.89 is: 9,589.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,872.91 : 28,313.55 = 6,391.89 : x
  2. Step 2: Convert to fraction form
    18,872.91/28,313.55 = 6,391.89/x
  3. Step 3: Cross multiply
    18,872.91x = 28,313.55 × 6,391.89
  4. Step 4: Simplify right side
    18,872.91x = 180,977,097.11
  5. Step 5: Solve for x
    x = 180,977,097.11/18,872.91
  6. Step 6: Final answer
    x = 9,589.25

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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.