Home / 20,939.25-31,408.62-6,147.63

Finding the Fourth Proportional to 20,939.25, 31,408.62 and 6,147.63

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Solution

The fourth proportional to 20,939.25, 31,408.62 and 6,147.63 is: 9,221.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.25 : 31,408.62 = 6,147.63 : x
  2. Step 2: Convert to fraction form
    20,939.25/31,408.62 = 6,147.63/x
  3. Step 3: Cross multiply
    20,939.25x = 31,408.62 × 6,147.63
  4. Step 4: Simplify right side
    20,939.25x = 193,088,574.57
  5. Step 5: Solve for x
    x = 193,088,574.57/20,939.25
  6. Step 6: Final answer
    x = 9,221.37

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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.