Home / 20,760.85-31,146.22-6,720.88

Finding the Fourth Proportional to 20,760.85, 31,146.22 and 6,720.88

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Solution

The fourth proportional to 20,760.85, 31,146.22 and 6,720.88 is: 10,082.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.85 : 31,146.22 = 6,720.88 : x
  2. Step 2: Convert to fraction form
    20,760.85/31,146.22 = 6,720.88/x
  3. Step 3: Cross multiply
    20,760.85x = 31,146.22 × 6,720.88
  4. Step 4: Simplify right side
    20,760.85x = 209,330,007.07
  5. Step 5: Solve for x
    x = 209,330,007.07/20,760.85
  6. Step 6: Final answer
    x = 10,082.92

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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.