Home / 18,878.58-28,288.44-11,938.50

Finding the Fourth Proportional to 18,878.58, 28,288.44 and 11,938.50

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Solution

The fourth proportional to 18,878.58, 28,288.44 and 11,938.50 is: 17,889.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.58 : 28,288.44 = 11,938.50 : x
  2. Step 2: Convert to fraction form
    18,878.58/28,288.44 = 11,938.50/x
  3. Step 3: Cross multiply
    18,878.58x = 28,288.44 × 11,938.50
  4. Step 4: Simplify right side
    18,878.58x = 337,721,540.94
  5. Step 5: Solve for x
    x = 337,721,540.94/18,878.58
  6. Step 6: Final answer
    x = 17,889.14

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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.