Home / 18,428.31-25,434.72-11,721.87

Finding the Fourth Proportional to 18,428.31, 25,434.72 and 11,721.87

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Solution

The fourth proportional to 18,428.31, 25,434.72 and 11,721.87 is: 16,178.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.31 : 25,434.72 = 11,721.87 : x
  2. Step 2: Convert to fraction form
    18,428.31/25,434.72 = 11,721.87/x
  3. Step 3: Cross multiply
    18,428.31x = 25,434.72 × 11,721.87
  4. Step 4: Simplify right side
    18,428.31x = 298,142,481.33
  5. Step 5: Solve for x
    x = 298,142,481.33/18,428.31
  6. Step 6: Final answer
    x = 16,178.50

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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.