Home / 20,979.35-31,464.46-6,936.06

Finding the Fourth Proportional to 20,979.35, 31,464.46 and 6,936.06

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Solution

The fourth proportional to 20,979.35, 31,464.46 and 6,936.06 is: 10,402.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.35 : 31,464.46 = 6,936.06 : x
  2. Step 2: Convert to fraction form
    20,979.35/31,464.46 = 6,936.06/x
  3. Step 3: Cross multiply
    20,979.35x = 31,464.46 × 6,936.06
  4. Step 4: Simplify right side
    20,979.35x = 218,239,347.75
  5. Step 5: Solve for x
    x = 218,239,347.75/20,979.35
  6. Step 6: Final answer
    x = 10,402.58

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1.5x scale

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.