Home / 20,846.12-31,272.42-6,991.88

Finding the Fourth Proportional to 20,846.12, 31,272.42 and 6,991.88

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Solution

The fourth proportional to 20,846.12, 31,272.42 and 6,991.88 is: 10,488.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,846.12 : 31,272.42 = 6,991.88 : x
  2. Step 2: Convert to fraction form
    20,846.12/31,272.42 = 6,991.88/x
  3. Step 3: Cross multiply
    20,846.12x = 31,272.42 × 6,991.88
  4. Step 4: Simplify right side
    20,846.12x = 218,652,851.59
  5. Step 5: Solve for x
    x = 218,652,851.59/20,846.12
  6. Step 6: Final answer
    x = 10,488.90

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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.