Home / 20,979.40-31,458.26-6,186.44

Finding the Fourth Proportional to 20,979.40, 31,458.26 and 6,186.44

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Solution

The fourth proportional to 20,979.40, 31,458.26 and 6,186.44 is: 9,276.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.40 : 31,458.26 = 6,186.44 : x
  2. Step 2: Convert to fraction form
    20,979.40/31,458.26 = 6,186.44/x
  3. Step 3: Cross multiply
    20,979.40x = 31,458.26 × 6,186.44
  4. Step 4: Simplify right side
    20,979.40x = 194,614,496.17
  5. Step 5: Solve for x
    x = 194,614,496.17/20,979.40
  6. Step 6: Final answer
    x = 9,276.46

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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.