Home / 20,979.09-31,468.64-5,395.50

Finding the Fourth Proportional to 20,979.09, 31,468.64 and 5,395.50

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Solution

The fourth proportional to 20,979.09, 31,468.64 and 5,395.50 is: 8,093.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.09 : 31,468.64 = 5,395.50 : x
  2. Step 2: Convert to fraction form
    20,979.09/31,468.64 = 5,395.50/x
  3. Step 3: Cross multiply
    20,979.09x = 31,468.64 × 5,395.50
  4. Step 4: Simplify right side
    20,979.09x = 169,789,020.14
  5. Step 5: Solve for x
    x = 169,789,020.14/20,979.09
  6. Step 6: Final answer
    x = 8,093.25

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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.