Home / 18,821.78-28,237.32-13,285.97

Finding the Fourth Proportional to 18,821.78, 28,237.32 and 13,285.97

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Solution

The fourth proportional to 18,821.78, 28,237.32 and 13,285.97 is: 19,932.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,821.78 : 28,237.32 = 13,285.97 : x
  2. Step 2: Convert to fraction form
    18,821.78/28,237.32 = 13,285.97/x
  3. Step 3: Cross multiply
    18,821.78x = 28,237.32 × 13,285.97
  4. Step 4: Simplify right side
    18,821.78x = 375,160,045.21
  5. Step 5: Solve for x
    x = 375,160,045.21/18,821.78
  6. Step 6: Final answer
    x = 19,932.24

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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.