Home / 20,983.58-31,475.37-6,939.84

Finding the Fourth Proportional to 20,983.58, 31,475.37 and 6,939.84

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Solution

The fourth proportional to 20,983.58, 31,475.37 and 6,939.84 is: 10,409.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.58 : 31,475.37 = 6,939.84 : x
  2. Step 2: Convert to fraction form
    20,983.58/31,475.37 = 6,939.84/x
  3. Step 3: Cross multiply
    20,983.58x = 31,475.37 × 6,939.84
  4. Step 4: Simplify right side
    20,983.58x = 218,433,931.06
  5. Step 5: Solve for x
    x = 218,433,931.06/20,983.58
  6. Step 6: Final answer
    x = 10,409.76

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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.