Home / 20,983.80-31,467.72-6,939.60

Finding the Fourth Proportional to 20,983.80, 31,467.72 and 6,939.60

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Solution

The fourth proportional to 20,983.80, 31,467.72 and 6,939.60 is: 10,406.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.80 : 31,467.72 = 6,939.60 : x
  2. Step 2: Convert to fraction form
    20,983.80/31,467.72 = 6,939.60/x
  3. Step 3: Cross multiply
    20,983.80x = 31,467.72 × 6,939.60
  4. Step 4: Simplify right side
    20,983.80x = 218,373,389.71
  5. Step 5: Solve for x
    x = 218,373,389.71/20,983.80
  6. Step 6: Final answer
    x = 10,406.76

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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.