Home / 20,728.80-31,085.46-6,685.29

Finding the Fourth Proportional to 20,728.80, 31,085.46 and 6,685.29

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Solution

The fourth proportional to 20,728.80, 31,085.46 and 6,685.29 is: 10,025.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.80 : 31,085.46 = 6,685.29 : x
  2. Step 2: Convert to fraction form
    20,728.80/31,085.46 = 6,685.29/x
  3. Step 3: Cross multiply
    20,728.80x = 31,085.46 × 6,685.29
  4. Step 4: Simplify right side
    20,728.80x = 207,815,314.88
  5. Step 5: Solve for x
    x = 207,815,314.88/20,728.80
  6. Step 6: Final answer
    x = 10,025.44

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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.