Home / 18,129.79-27,189.73-4,979.04

Finding the Fourth Proportional to 18,129.79, 27,189.73 and 4,979.04

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Solution

The fourth proportional to 18,129.79, 27,189.73 and 4,979.04 is: 7,467.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,129.79 : 27,189.73 = 4,979.04 : x
  2. Step 2: Convert to fraction form
    18,129.79/27,189.73 = 4,979.04/x
  3. Step 3: Cross multiply
    18,129.79x = 27,189.73 × 4,979.04
  4. Step 4: Simplify right side
    18,129.79x = 135,378,753.26
  5. Step 5: Solve for x
    x = 135,378,753.26/18,129.79
  6. Step 6: Final answer
    x = 7,467.20

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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.