Home / 3,121.69-4,307.96-1,724.44

Finding the Fourth Proportional to 3,121.69, 4,307.96 and 1,724.44

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Solution

The fourth proportional to 3,121.69, 4,307.96 and 1,724.44 is: 2,379.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.69 : 4,307.96 = 1,724.44 : x
  2. Step 2: Convert to fraction form
    3,121.69/4,307.96 = 1,724.44/x
  3. Step 3: Cross multiply
    3,121.69x = 4,307.96 × 1,724.44
  4. Step 4: Simplify right side
    3,121.69x = 7,428,812.08
  5. Step 5: Solve for x
    x = 7,428,812.08/3,121.69
  6. Step 6: Final answer
    x = 2,379.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.