Home / 20,976.60-31,465.26-5,394.36

Finding the Fourth Proportional to 20,976.60, 31,465.26 and 5,394.36

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Solution

The fourth proportional to 20,976.60, 31,465.26 and 5,394.36 is: 8,091.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.60 : 31,465.26 = 5,394.36 : x
  2. Step 2: Convert to fraction form
    20,976.60/31,465.26 = 5,394.36/x
  3. Step 3: Cross multiply
    20,976.60x = 31,465.26 × 5,394.36
  4. Step 4: Simplify right side
    20,976.60x = 169,734,939.93
  5. Step 5: Solve for x
    x = 169,734,939.93/20,976.60
  6. Step 6: Final answer
    x = 8,091.63

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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.