Home / 20,679.67-31,004.38-6,631.70

Finding the Fourth Proportional to 20,679.67, 31,004.38 and 6,631.70

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Solution

The fourth proportional to 20,679.67, 31,004.38 and 6,631.70 is: 9,942.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.67 : 31,004.38 = 6,631.70 : x
  2. Step 2: Convert to fraction form
    20,679.67/31,004.38 = 6,631.70/x
  3. Step 3: Cross multiply
    20,679.67x = 31,004.38 × 6,631.70
  4. Step 4: Simplify right side
    20,679.67x = 205,611,633.38
  5. Step 5: Solve for x
    x = 205,611,633.38/20,679.67
  6. Step 6: Final answer
    x = 9,942.70

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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.