Home / 18,078.18-27,112.40-6,389.88

Finding the Fourth Proportional to 18,078.18, 27,112.40 and 6,389.88

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Solution

The fourth proportional to 18,078.18, 27,112.40 and 6,389.88 is: 9,583.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,078.18 : 27,112.40 = 6,389.88 : x
  2. Step 2: Convert to fraction form
    18,078.18/27,112.40 = 6,389.88/x
  3. Step 3: Cross multiply
    18,078.18x = 27,112.40 × 6,389.88
  4. Step 4: Simplify right side
    18,078.18x = 173,244,982.51
  5. Step 5: Solve for x
    x = 173,244,982.51/18,078.18
  6. Step 6: Final answer
    x = 9,583.10

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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.