Home / 20,728.53-31,092.21-5,146.11

Finding the Fourth Proportional to 20,728.53, 31,092.21 and 5,146.11

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Solution

The fourth proportional to 20,728.53, 31,092.21 and 5,146.11 is: 7,719.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.53 : 31,092.21 = 5,146.11 : x
  2. Step 2: Convert to fraction form
    20,728.53/31,092.21 = 5,146.11/x
  3. Step 3: Cross multiply
    20,728.53x = 31,092.21 × 5,146.11
  4. Step 4: Simplify right side
    20,728.53x = 160,003,932.80
  5. Step 5: Solve for x
    x = 160,003,932.80/20,728.53
  6. Step 6: Final answer
    x = 7,719.02

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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.